Solved papers for MGIMS WARDHA MGIMS WARDHA Solved Paper-2010

done MGIMS WARDHA Solved Paper-2010 Total Questions - 180

• question_answer1) Two capacitors, one 4 pF and the other 6 pF, connected in parallel, are charged by a 100 V battery. The energy stored in the capacitors is
  A)
  \[1.2\times {{10}^{-8}}J\]                            
  done clear
  B)
   \[2.4\times {{10}^{-8}}J\]
  done clear
  C)
  \[5.0\times {{10}^{-8}}J\]                            
  done clear
  D)
   \[1.2\times {{10}^{-6}}J\]
  done clear
  View Answer play_arrow

• question_answer2) The electrical resistivity of a sample
  A)
   is proportional to its length
  done clear
  B)
   is proportional to the area of cross-section
  done clear
  C)
   is inversely proportional to the length
  done clear
  D)
   neither depends on the length nor on the area of cross-section
  done clear
  View Answer play_arrow

• question_answer3) A voltmeter of resistance 998\[\Omega \] is connected across a cell of emf 2 V and internal resistance 2\[\Omega .\]The potential difference across the voltmeter is
  A)
   1.99V                                   
  done clear
  B)
   3.5 V
  done clear
  C)
    5V                                        
  done clear
  D)
   6V
  done clear
  View Answer play_arrow

• question_answer4) A solenoid of length 50 cm and a radius of cross-section 1 cm has 1000 turns of wire wound over it. If the current carried is 5 A, the magnetic field on its axis, near the centre of the solenoid is approximately (permeability of free space  \[{{\mu }_{0}}~=4\pi \times {{10}^{-7}}T-m/A\])
  A)
  \[0.63\times {{10}^{-2}}T\]                         
  done clear
  B)
   \[1.26\times {{10}^{-2}}T\]
  done clear
  C)
  \[2.51\times {{10}^{-2}}T\]                         
  done clear
  D)
   6.3 T
  done clear
  View Answer play_arrow

• question_answer5) A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v, perpendicular to one of its sides. A magnetic field of induction B, constant in space and time and pointing perpendicularly into the plane of the square, exists everywhere in space. The current induced in the loop is
  A)
   BLv/R in the clockwise direction
  done clear
  B)
   BLv/R in the anticlockwise direction
  done clear
  C)
    2 BLv/R in the clockwise direction
  done clear
  D)
   zero
  done clear
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• question_answer6) A sinusoidal voltage of peak value 300 V and an angular frequency \[\omega \]= 400 rad/s is applied to series L-C-R  circuit, in which R = 3\[\Omega \] L = 20 mH and C = 625 \[\mu F.\] The peak current in the circuit is
  A)
   30\[\sqrt{2}\]A                               
  done clear
  B)
   60 A
  done clear
  C)
   100 A                                   
  done clear
  D)
   60\[\sqrt{2}\]A
  done clear
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• question_answer7) A circuit contains a capacitor and inductance each with negligible resistance. The capacitor is initially charged and the charging battery is disconnected. At subsequent time, the charge on the capacitor will
  A)
   increase exponentially
  done clear
  B)
   decrease exponentially
  done clear
  C)
   decrease linearly
  done clear
  D)
   remain constant
  done clear
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• question_answer8) Two coherent monochromatic light beams of intensities\[I\]and 9\[I\] are superimposed. The maximum and the minimum intensities of the resultant beams are
  A)
   10\[I\] and zero              
  done clear
  B)
   10\[I\] and 8\[I\]
  done clear
  C)
    10\[I\]and 4 \[I\]           
  done clear
  D)
   16\[I\]and 4\[I\]
  done clear
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• question_answer9) In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is 5 mm. The screen on which the diffraction pattern is displayed is at a distance of 80 cm from the slit. The wavelength is \[6000{AA}\]The slit width (in mm) is about
  A)
   0.576                                   
  done clear
  B)
   0.348
  done clear
  C)
   0.192                                   
  done clear
  D)
   0.096
  done clear
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• question_answer10) When a ray is incident on a medium of refractive index n at Brewster's angle, it gets
  A)
   totally reflected              
  done clear
  B)
   totally absorbed
  done clear
  C)
   circularly polarized         
  done clear
  D)
   plane polarized
  done clear
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• question_answer11) A transformer of 100% efficiency has 200rums in the primary and 40000 turns in secondary. It is connected to a 220 V main supply and secondary feeds to a 100\[K\Omega \] resistance. The potential difference per turn is
  A)
   1.1V                                     
  done clear
  B)
   25V
  done clear
  C)
    18V                                     
  done clear
  D)
   11 V
  done clear
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• question_answer12) The ground state energy of hydrogen atom is -13.6 eV. The kinetic energy of the electron in this state is
  A)
   27.2 eV                               
  done clear
  B)
   13.6 eV
  done clear
  C)
   6.8 eV                                 
  done clear
  D)
   3.4 eV
  done clear
  View Answer play_arrow

• question_answer13) The energy gap between the valence band and the conduction band for a material is 6 eV. The material is
  A)
   an insulator
  done clear
  B)
   a metal
  done clear
  C)
   an intrinsic semiconductor
  done clear
  D)
   a superconductor
  done clear
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• question_answer14) An AC signal of 50 Hz frequency is input of a full wave rectifier using two diodes. The output frequency after full wave rectification is
  A)
   25 Hz                                   
  done clear
  B)
   50 Hz
  done clear
  C)
   100 Hz                                 
  done clear
  D)
    200 Hz
  done clear
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• question_answer15) A satellite is in a circular orbit round the earth at an altitude R above the earth's surface, where R is the radius of the earth. If g is the acceleration due to gravity on the surface of the earth the speed of the satellite is
  A)
   \[\sqrt{2Rg}\]                                  
  done clear
  B)
  \[\sqrt{Rg}\]
  done clear
  C)
   \[\sqrt{Rg/2}\]                                
  done clear
  D)
  \[\sqrt{Rg/4}\]
  done clear
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• question_answer16) The moment of inertia of a ring about one of its diameter is\[I.\]What will be its moment of inertia about a tangent parallel to the diameter?
  A)
   4\[I\]                                   
  done clear
  B)
   \[2\,I\]
  done clear
  C)
   \[\frac{3}{2}I\]                                
  done clear
  D)
   \[3\,I\]
  done clear
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• question_answer17) A massless spring of natural length of 0.5 m and  spring constant 50 N/m has one end fixed and the other end attached to mass of 250 g. The spring mass system is on a smooth floor. The mass is pulled until the length of the spring is 0.6 and then released from rest. The kinetic energy of the mass when the length of the spring is 0.5 m is
  A)
   0.0176 J                              
  done clear
  B)
   2.25 J
  done clear
  C)
   6.25 J                                   
  done clear
  D)
   9J
  done clear
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• question_answer18) A disc, initially at rest, starts rotating about its own axis, with a constant angular acceleration of 0.2 rad/s2.The time taken by the disc to rotate by 10 rad is (in second)
  A)
   7.07                                      
  done clear
  B)
   10
  done clear
  C)
   14.14                                   
  done clear
  D)
   100
  done clear
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• question_answer19) A 4 m long copper wire of cross-sectional area 1.2 cm2 is stretched by a force of \[4.8\times {{10}^{3}}N,\]Young's    modulus    for    copper   is \[y=1.2\times {{10}^{11}}N/{{m}^{2}}\]the increase in length of the wire is
  A)
   1.32mm                              
  done clear
  B)
   0.8mm
  done clear
  C)
   0.48 mm                             
  done clear
  D)
   5.36 mm
  done clear
  View Answer play_arrow

• question_answer20) A stationary police car sounds a siren with a frequency of 990 Hz. If the speed of sound is 330 m/s, an observer, driving towards the car with a speed of 33 m/s, will hear a frequency of
  A)
   891 Hz                                 
  done clear
  B)
   900 Hz
  done clear
  C)
   1089 Hz                               
  done clear
  D)
   1100 Hz
  done clear
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• question_answer21) Given that the surface tension of water is 75 dyne/cm, its density 1 g/c and angle of contact zero, the height to which water rises m a capillary tube of 1 mm diameter is (Take g= 10 m/s2)
  A)
   9.0cm                                  
  done clear
  B)
   7.5cm
  done clear
  C)
   6.0cm                                  
  done clear
  D)
   3.0cm
  done clear
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• question_answer22) An ideal gas heat engine operates in Carnot cycle between \[227{}^\circ C\] and \[127{}^\circ C\]. It absorbs \[6\times {{10}^{4}}cal\]of heat at higher temperature. Amount of heat converted into work is
  A)
  \[1.2\times {{10}^{4}}1\]                             
  done clear
  B)
   \[2.2\times {{10}^{4}}cal\]
  done clear
  C)
  \[6.0\times {{10}^{4}}cal\]                          
  done clear
  D)
   \[4.8\times {{10}^{4}}cal\]
  done clear
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• question_answer23) To which logic gate does the truth table given below correspond?

  A	B	X
  0 0 1 1	0 1 0 1	0 1 1 0

  A)
   AND                                     
  done clear
  B)
   OR
  done clear
  C)
   NAND                                 
  done clear
  D)
   XOR
  done clear
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• question_answer24) Avalanche breakdown in a p-n junction diode is due to
  A)
   shift of Fermi level
  done clear
  B)
   widening of forbidden gap
  done clear
  C)
   high impurity concentration
  done clear
  D)
   cumulative effect of conduction band electrons collision
  done clear
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• question_answer25) If the radius of the first Bohr orbit of the hydrogen atom is \[5.29\times {{10}^{-11}}m,\] the radius of the second orbit will be
  A)
   \[21.16\times {{10}^{-11}}m\]                  
  done clear
  B)
   \[15.87\times {{10}^{-11}}m\]
  done clear
  C)
   \[10.58\times {{10}^{-11}}m\]                  
  done clear
  D)
   \[2.64\times {{10}^{-11}}m\]
  done clear
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• question_answer26) Number of nuclei of a radioactive substance at time t = 0 are 2000 and 1800 at time r = 2 s. Number of nuclei left after t = 6 s is
  A)
   1442                                     
  done clear
  B)
   1554
  done clear
  C)
   1652                                     
  done clear
  D)
   1458
  done clear
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• question_answer27) \[_{92}{{U}^{238}}\]on absorbing a neutron goes over to \[_{92}{{U}^{239}}.\] This nucleus emits an electron to go over to neptunium which on further emitting an electron goes over to plutonium. The resulting plutonium can be expressed as
  A)
  \[_{94}P{{u}^{239}}\]                                    
  done clear
  B)
   \[_{90}P{{u}^{219}}\]
  done clear
  C)
  \[{{~}_{93}}P{{u}^{240}}\]                                           
  done clear
  D)
   \[_{92}P{{u}^{240}}\]
  done clear
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• question_answer28) The energy of a photon corresponding to the visible light of maximum wavelength is approximately
  A)
   1 eV                                     
  done clear
  B)
   1.6eV
  done clear
  C)
   3.2 eV                                 
  done clear
  D)
   7eV
  done clear
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• question_answer29) A magnetic Held of \[2\times {{10}^{-2}}T\]acts at right angles to a coil of area 100 cm2 with 50 turns. The average emf induced in the coil is 0.1 V. When it is removed from the field in time r, the value of t is
  A)
   0.1 s                                     
  done clear
  B)
   0.01 s
  done clear
  C)
   1 s                                         
  done clear
  D)
   10 s
  done clear
  View Answer play_arrow

• question_answer30) A battery of four cells in series, each having an emf of 1.4V and an internal resistance of \[2\Omega \]is to be used to charge a small 2 V accumulator of negligible internal resistance. What is the charging current?
  A)
   0.1 A                                    
  done clear
  B)
   0.2 A
  done clear
  C)
   0.3 A                                    
  done clear
  D)
   0.45 A
  done clear
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• question_answer31) If the energy of a 100 \[\mu F\] capacitor charged to 6 kV could all be used to lift a 50 kg mass, what would be the greatest vertical height through which mass could be raised?
  A)
   0.6mm                                
  done clear
  B)
   3.6m
  done clear
  C)
   1.2mm                                
  done clear
  D)
   12m
  done clear
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• question_answer32) A pan containing a layer of uniform thickness of ice is placed on a circular turntable with its centre coinciding with the centre of the turntable. The turntable is now rotated at a constant angular velocity about a vertical axis passing through its centre and the driving torque is withdrawn. There is no friction between the table and the pivot. The pan rotates with the table. As the ice melts
  A)
   the angular velocity of the system decreases
  done clear
  B)
   the angular velocity of the system increases
  done clear
  C)
   the angular velocity of the system remains unchanged
  done clear
  D)
   the moment of inertia of the system decreases
  done clear
  View Answer play_arrow

• question_answer33) Two satellites \[{{S}_{1}}\] and \[{{S}_{2}}\] revolve round a planet in coplanar circular orbits in the same sense. Their periods of revolution are 1 h and 8 h respectively. The radius of the orbit of \[{{S}_{1}}\] is 104 km. The speed of \[{{S}_{2}}\]relative to \[{{S}_{1}}\] when they are closest, in km/h is
  A)
   \[{{10}^{4}}\pi \]    
  done clear
  B)
   \[2\times {{10}^{4}}\pi \]
  done clear
  C)
    \[{{10}^{4}}\frac{\pi }{2}\]                                         
  done clear
  D)
   \[4\times {{10}^{4}}\pi \]
  done clear
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• question_answer34) Two pendulums of lengths 100 cm and 121 cm start vibrating. At some instant the two are at the mean position in the same phase. After how many vibrations of the longer pendulum will the two be in the same phase at the mean position again?
  A)
   10                                         
  done clear
  B)
   11
  done clear
  C)
   20                                         
  done clear
  D)
   21
  done clear
  View Answer play_arrow

• question_answer35) The temperature at which the mean KE of the molecules of gas is one-third of the mean KE of its molecules at \[180{}^\circ C\] is
  A)
  \[-122{}^\circ C\]   
  done clear
  B)
  \[-90{}^\circ C\]
  done clear
  C)
  \[60{}^\circ C\]
  done clear
  D)
  \[151{}^\circ C\]
  done clear
  View Answer play_arrow

• question_answer36) A disc of a siren containing 60 holes rotates at a constant speed of 360 rpm. The emitted sound is in unison with a tuning fork of frequency
  A)
   10 Hz                                   
  done clear
  B)
   360 Hz
  done clear
  C)
   216 Hz                                 
  done clear
  D)
   60 Hz
  done clear
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• question_answer37) In which process the rate of transfer of heat is maximum?
  A)
   Conduction
  done clear
  B)
   Radiation
  done clear
  C)
   Convection
  done clear
  D)
   In all three heat is transferred with the same speed
  done clear
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• question_answer38) The gas in a vessel is subjected to a pressure of 20 atm at a temperature 27°C. The pressure of the gas in a vessel after one-half of the gas is released from the vessel and the temperature  of the remainder is raised by 50°C is
  A)
   8.5 atm                               
  done clear
  B)
   10.8 atm
  done clear
  C)
   11.7 atm                             
  done clear
  D)
   17 atm
  done clear
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• question_answer39) If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li2+ is
  A)
   30.6 eV                               
  done clear
  B)
   13.6 eV
  done clear
  C)
   3.4 eV                                 
  done clear
  D)
   122.4 eV
  done clear
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• question_answer40) To  demonstrate  the  phenomenon  of interference we require two sources which emit radiations of
  A)
   nearly the same frequency
  done clear
  B)
   the same frequency
  done clear
  C)
    different wavelengths
  done clear
  D)
   the same frequency and having a definite phase relationship
  done clear
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• question_answer41) To get three images of a single object, one should have two plane mirrors at an angle of
  A)
  \[60{}^\circ \]                            
  done clear
  B)
  \[90{}^\circ \]
  done clear
  C)
  \[120{}^\circ \]          
  done clear
  D)
  \[30{}^\circ \]
  done clear
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• question_answer42) According to Newton's law of cooling, the rate of cooling of a body is proportional to\[{{(\Delta \theta )}^{n}},\] where \[\Delta \theta \] is the difference of the temperature of the body and the surroundings, and n is equal to
  A)
   2                                            
  done clear
  B)
   3
  done clear
  C)
   4                                            
  done clear
  D)
   1
  done clear
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• question_answer43) A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
  A)
   decreases                         
  done clear
  B)
   remains unchanged
  done clear
  C)
   becomes infinite
  done clear
  D)
   in creases
  done clear
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• question_answer44) A metal wire of linear mass density of 9.8 g/m is stretched with a tension of 10 kg-wt between two rigid supports 1 m apart. The wire passes at its middle point between the poles of a permanent magnet and it vibrates in resonance when carrying an alternating current of frequency n. The frequency n of the alternating source is
  A)
   50 Hz                                   
  done clear
  B)
   100 Hz
  done clear
  C)
   200 Hz                                 
  done clear
  D)
   25 Hz
  done clear
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• question_answer45) If the electric fluxes entering and leaving an enclosed surface respectively are\[{{\phi }_{1}}\]and \[{{\phi }_{2,}}\] the electric charge inside the surface will be
  A)
  \[({{\phi }_{2}}-{{\phi }_{1}}){{\varepsilon }_{o}}\]                           
  done clear
  B)
  \[({{\phi }_{1}}+{{\phi }_{2}})/{{\varepsilon }_{o}}\]
  done clear
  C)
  \[({{\phi }_{2}}-{{\phi }_{1}})/{{\varepsilon }_{o}}\]                         
  done clear
  D)
  \[({{\phi }_{1}}+{{\phi }_{2}})/{{\varepsilon }_{o}}\]
  done clear
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• question_answer46) Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
  A)
   the rates at which currents are changing in the two coils
  done clear
  B)
   relative position and orientation of the two
  done clear
  C)
   coils the materials of the wires of the coils
  done clear
  D)
   the currents in the two coils
  done clear
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• question_answer47) An ammeter reads upto 1 A. Its internal resistance is 0.81\[\Omega .\] To increase die range to 10 A, the value of the required shunt is
  A)
   0.03\[\Omega \]                             
  done clear
  B)
   0.3\[\Omega \]
  done clear
  C)
   0.9\[\Omega \]                               
  done clear
  D)
   0.09\[\Omega \]
  done clear
  View Answer play_arrow

• question_answer48) A particle performing uniform circular motion has angular momentum L. If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is
  A)
   \[\frac{L}{4}\]                                  
  done clear
  B)
  \[2L\]
  done clear
  C)
   \[4L\]                                  
  done clear
  D)
   \[\frac{L}{2}\]
  done clear
  View Answer play_arrow

• question_answer49) A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness r/4. Then the relation between Ac moments of inertia \[{{I}_{x}}\] and \[{{I}_{\gamma }}\] is
  A)
   \[{{I}_{\gamma }}=32{{I}_{x}}\]                               
  done clear
  B)
   \[{{I}_{\gamma }}=16{{I}_{x}}\]
  done clear
  C)
   \[{{I}_{\gamma }}={{I}_{x}}\]                                    
  done clear
  D)
  \[{{I}_{\gamma }}=64{{I}_{x}}\]
  done clear
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• question_answer50) Consider telecommunication through optical fibres. Which of the following statements is not true?
  A)
   Optical fibres can be of graded refractive index
  done clear
  B)
   Optical fibres are subjected to electromagnetic interference from outside
  done clear
  C)
   Optical fibres have extremely low transmission loss
  done clear
  D)
   Optical fibres may have homogeneous core with a suitable cladding
  done clear
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• question_answer51) The thermo-emf of a thermocouple is 25\[\mu \]V/°C at room temperature. A galvanometer of 40\[\Omega \] resistance, capable of detecting current as low as 10-5 A, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is
  A)
  \[16{}^\circ C\]                  
  done clear
  B)
  \[12{}^\circ C\]
  done clear
  C)
  \[8{}^\circ C\]                
  done clear
  D)
  \[20{}^\circ C\]
  done clear
  View Answer play_arrow

• question_answer52) The length of a wire of a potentiometer is 100 cm, and the emf of its stand and cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5\[\Omega \]If the balance point is obtained at \[l\] = 30 cm from the positive end, the emf of the battery is
  A)
  \[\frac{30E}{100.5}\]                                      
  done clear
  B)
  \[\frac{30E}{100-0.5}\]
  done clear
  C)
   \[\frac{30(E-0.5i)}{100}\]where \[i\]is the current in the potentiometer wire
  done clear
  D)
   \[\frac{30E}{100}\,\]
  done clear
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• question_answer53) The magnetic lines of force inside a bar magnet
  A)
   are from north-pole to south-pole of the magnet
  done clear
  B)
    do not exist
  done clear
  C)
   depend upon the area of cross-section of the bar magnet
  done clear
  D)
    are from south-pole to north-pole of the magnet
  done clear
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• question_answer54) Curie temperature is the temperature above which
  A)
   a ferromagnetic  material  becomes paramagnetic
  done clear
  B)
   a   paramagnetic   material  becomes diamagnetic
  done clear
  C)
    a   ferromagnetic  material  becomes diamagnetic
  done clear
  D)
    a   paramagnetic   material   becomes ferromagnetic
  done clear
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• question_answer55) A particle of mass M and charge \[Q\] moving with velocity \[\mathbf{\vec{V}}\] describes a circular path of radius R when subjected to a uniform transverse magnetic field of induction B. The work done by the field when the particle completes one full circle is
  A)
   \[\left( \frac{M{{v}^{2}}}{R} \right)2\pi R\]         
  done clear
  B)
   zero
  done clear
  C)
   \[BQ\,\,2\pi R\]                              
  done clear
  D)
   \[BQv\,\,2\pi R\]
  done clear
  View Answer play_arrow

• question_answer56) The neutral temperature of a thermocouple is \[3000{}^\circ C\]. What is the inversion temperature, if the temperature of cold junction is \[10{}^\circ C\]?
  A)
  \[590{}^\circ C\]
  done clear
  B)
  \[610{}^\circ C\]
  done clear
  C)
  \[310{}^\circ C\]        
  done clear
  D)
  \[290{}^\circ C\]
  done clear
  View Answer play_arrow

• question_answer57) An L-C-R series circuit consists of a resistance of 10 \[\Omega \] a capacitor of reactance 6.0 \[\Omega \]and an inductor coil. The circuit is found to resonate when put across a 300 V, 100 Hz supply- The inductance of coil is (take \[\pi \] = 3)
  A)
   0.1 H                                    
  done clear
  B)
   0.01 H
  done clear
  C)
   0.2 H                                    
  done clear
  D)
   0.02 H
  done clear
  View Answer play_arrow

• question_answer58) A wave travelling along positive \[x\]-axis is given by \[y\] = A sin \[(\omega t-kx).\] If it is reflected from rigid boundary such that 80% amplitude is reflected then equation of reflected wave is
  A)
   y = A sin \[(\omega t-kx)\]  
  done clear
  B)
   y = - 0.8 A sin\[(\omega t-kx)\]
  done clear
  C)
    y = 0.8 A sin \[(\omega t+kx)\]
  done clear
  D)
   y = A sin \[(\omega t+0.8\,kx)\]
  done clear
  View Answer play_arrow

• question_answer59) Standing waves are formed on a string when interference occurs between two waves having
  A)
   the same amplitude travelling in the same direction with no phase difference between them
  done clear
  B)
   the same amplitude, travelling in the opposite direction with no phase difference between them
  done clear
  C)
   different amplitudes travelling in the same direction
  done clear
  D)
   different amplitudes travelling in the opposite direction
  done clear
  View Answer play_arrow

• question_answer60) A 1 kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed of 4 m/s. The tension in the string is 6 N, when the stone is at
  A)
   top of the circle              
  done clear
  B)
   bottom of the circle
  done clear
  C)
   half way down
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer61) The reaction of chloroform with alcoholic \[KOH\]and p-toluidine form
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer62) Soaps are
  A)
  \[Mg\]salts of lower fatty acids
  done clear
  B)
  \[Na\]salts of lower fatty acids
  done clear
  C)
  \[Na\]salts of higher fatty acids
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer63) The function of anhydrous\[AlC{{l}_{3}}\]in the Friedel-Crart's reaction is to
  A)
   absorb water
  done clear
  B)
   absorb\[HCl\]
  done clear
  C)
   to produce electrophile
  done clear
  D)
   to produce nucleophile
  done clear
  View Answer play_arrow

• question_answer64) Which one of the following does not participate in the carbylamine reaction?
  A)
  \[KOH\]                               
  done clear
  B)
   Ethanol
  done clear
  C)
   Chloroform       
  done clear
  D)
   Aniline
  done clear
  View Answer play_arrow

• question_answer65) Alkyl halides react with Mg in dry ether to form
  A)
   magnesium halide
  done clear
  B)
   Grignard's reagent
  done clear
  C)
   alkene
  done clear
  D)
   alkyne
  done clear
  View Answer play_arrow

• question_answer66) The structure of\[I{{F}_{5}}\]can be best described as
  A)
                                              
  done clear
  B)
   
  done clear
  C)
                              
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer67) From elementry molecular orbital theory we can give the electronic configuration of the singly positive nitrogen molecular ion,\[N_{2}^{+}\]as
  A)
  \[\sigma 1{{s}^{2}},{{\sigma }^{*}}1{{s}^{2}},\sigma 2{{s}^{2}},{{\sigma }^{*}}2{{p}^{4}},\sigma 2{{p}^{1}}\]
  done clear
  B)
  \[\sigma 1{{s}^{2}},{{\sigma }^{*}}1{{s}^{2}},\sigma 2{{s}^{2}},{{\sigma }^{*}}2{{s}^{2}},\pi 2{{p}^{3}}\]
  done clear
  C)
  \[\sigma 1{{s}^{2}},{{\sigma }^{*}}1{{s}^{2}},\sigma 2{{s}^{2}},{{\sigma }^{*}}2{{s}^{2}},\sigma 2{{p}^{3}},\pi 2{{p}^{2}}\]               
  done clear
  D)
   \[\sigma 1{{s}^{2}},{{\sigma }^{*}}1{{s}^{2}},\sigma 2{{s}^{2}},{{\sigma }^{*}}2{{s}^{2}},\sigma 2{{p}^{2}},\pi 2{{p}^{4}}\]
  done clear
  View Answer play_arrow

• question_answer68) Which of the following has largest atomic radii?
  A)
  \[Al\]                                    
  done clear
  B)
  \[A{{l}^{+}}\]
  done clear
  C)
  \[A{{l}^{2+}}\]                                  
  done clear
  D)
  \[A{{l}^{3+}}\]
  done clear
  View Answer play_arrow

• question_answer69) lonisation potential is lowest for
  A)
   alkali metals
  done clear
  B)
   inert gases
  done clear
  C)
   halogens
  done clear
  D)
   alkaline earth metals
  done clear
  View Answer play_arrow

• question_answer70) Calcium bums in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas A and an alkaline solution. The solution on exposure to air produces a thin solid layer of B on the surface. The compounds A and B will be
  A)
  \[C{{a}_{3}}{{N}_{2}},N{{H}_{3}}\]           
  done clear
  B)
  \[N{{H}_{3}},C{{O}_{2}}\]
  done clear
  C)
  \[Ca{{(OH)}_{2}},CaC{{O}_{3}}\]               
  done clear
  D)
  \[N{{H}_{3}},CaC{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer71) The percentage of p-character in the orbitals forming \[PP\] bond in\[{{P}_{4}}\]is
  A)
   25                                         
  done clear
  B)
   33
  done clear
  C)
   50                                         
  done clear
  D)
   75
  done clear
  View Answer play_arrow

• question_answer72) The substance used in smoke screen is
  A)
   sodium chloride              
  done clear
  B)
   sodium phosphate
  done clear
  C)
   calcium fluoride              
  done clear
  D)
   calcium phosphide
  done clear
  View Answer play_arrow

• question_answer73) The valence shell electronic configuration of \[C{{r}^{2+}}\]ion is
  A)
   \[4{{s}^{0}}3{{d}^{4}}\]                               
  done clear
  B)
   \[3{{p}^{6}}4{{s}^{2}}\]
  done clear
  C)
   \[4{{s}^{3}}3{{d}^{2}}\]                               
  done clear
  D)
   \[4{{s}^{2}}3{{d}^{0}}\]
  done clear
  View Answer play_arrow

• question_answer74) Which of the following complexes do not follow EAN rule?
  A)
   \[{{[Fe{{(CN)}_{6}}]}^{4-}}\]                     
  done clear
  B)
   \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]
  done clear
  C)
   \[Ni{{(CO)}_{4}}\]          
  done clear
  D)
   \[{{[PdC{{l}_{4}}]}^{2-}}\]
  done clear
  View Answer play_arrow

• question_answer75) Consider the reaction,\[F{{e}^{2+}}F{{e}^{3+}}+{{e}^{-}}\]
  A)
   the reaction towards the left is a reduction
  done clear
  B)
   the reduction towards the right is a reduction
  done clear
  C)
   the reaction towards the right is an oxidation
  done clear
  D)
   Both  and  are correct
  done clear
  View Answer play_arrow

• question_answer76) A solution contains\[25%\text{ }Hp,\text{ }25%\,{{C}_{2}}{{H}_{5}}OH\] and 50%\[C{{H}_{3}}COOH\]by mass. The mole fraction of\[{{H}_{2}}O\]would be
  A)
   0.25                                      
  done clear
  B)
   2.5
  done clear
  C)
   0.502                                   
  done clear
  D)
   5.03
  done clear
  View Answer play_arrow

• question_answer77) Blue colour of water in sea is due to
  A)
   refraction of blue light by impurities in sea water
  done clear
  B)
   refraction of blue sky by water
  done clear
  C)
   scattering of light by impurities
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer78) In aerosol, the dispersion medium is
  A)
   solid                                     
  done clear
  B)
   liquid
  done clear
  C)
   gas                                       
  done clear
  D)
   All of these
  done clear
  View Answer play_arrow

• question_answer79) A reaction,\[2A\text{ }\xrightarrow{{}}\]products\[(x)\]is found to follow zero order kinetics. Then
  A)
  \[\frac{dx}{dt}=k[A]\]                   
  done clear
  B)
  \[\frac{dx}{dt}=k{{[A]}^{0}}\]
  done clear
  C)
  \[\frac{dx}{dt}=k{{[A]}^{2}}\]    
  done clear
  D)
         \[\frac{dx}{dt}=k[2A]\]
  done clear
  View Answer play_arrow

• question_answer80) The rate of a reaction is primarily determined by the slowest step. This step is called
  A)
   rate determining step
  done clear
  B)
   reaction rate
  done clear
  C)
    activation step
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer81) If the solubility of\[PbC{{l}_{2}}\]at\[25{}^\circ C\]is\[6.3\times {{10}^{-2}}\]mol/L, its solubility product is
  A)
  \[1\times {{10}^{-6}}\]                                  
  done clear
  B)
  \[1\times {{10}^{-3}}\]
  done clear
  C)
  \[1.1\times {{10}^{-6}}\]              
  done clear
  D)
  \[1.1\times {{10}^{-5}}\]
  done clear
  View Answer play_arrow

• question_answer82) A double bond connecting two atoms. There is a sharing of
  A)
   2 electrons        
  done clear
  B)
   1 electron
  done clear
  C)
   4 electrons       
  done clear
  D)
   All electrons
  done clear
  View Answer play_arrow

• question_answer83) What is the product B in the following reaction sequence? \[C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  |\,| \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\xrightarrow{KCN/{{H}_{2}}S{{O}_{4}}}A\xrightarrow{LiAl{{H}_{4}}}B\]
  A)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-COOH\]
  done clear
  B)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-COOH\]
  done clear
  C)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}N{{H}_{2}}\]
  done clear
  D)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{{}}{\mathop{CH}}}\,-CN\]
  done clear
  View Answer play_arrow

• question_answer84) \[HCl\]is a gas but HF is a low boiling liquid. This is because
  A)
  \[HF\]bond is strong
  done clear
  B)
  \[HF\]bond is weak
  done clear
  C)
   molecules aggregate because of hydrogen bonding
  done clear
  D)
   HF is a weak acid
  done clear
  View Answer play_arrow

• question_answer85) Chloroform, on exposing to air and sunlight produce
  A)
   chloropicrin
  done clear
  B)
   phosgene
  done clear
  C)
   carbon tetrachloride
  done clear
  D)
   benzene
  done clear
  View Answer play_arrow

• question_answer86) When two double bonds are present on adjacent carbon atoms, the diene is called as
  A)
   conjugated diene          
  done clear
  B)
   cumulative diene
  done clear
  C)
   isolated diene                 
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer87) \[B\xleftarrow[{}]{Lindlar's\,catayst/{{H}_{2}}}RC\equiv CR\xrightarrow{Na/N{{H}_{3}}}A,\] A and B are geometrical isomers \[(RCH=CHR)\].
  A)
   A is c is, B is trans
  done clear
  B)
   A is trans, B is c is
  done clear
  C)
    A and B both are c is
  done clear
  D)
   A and B both are trans
  done clear
  View Answer play_arrow

• question_answer88) The homologue of ethyne is
  A)
   \[{{C}_{2}}{{H}_{4}}\]                   
  done clear
  B)
   \[{{C}_{3}}{{H}_{6}}\]
  done clear
  C)
   \[{{C}_{3}}{{H}_{3}}\]                   
  done clear
  D)
   \[{{C}_{3}}{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer89) \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]with excess of\[{{C}_{2}}{{H}_{5}}MgBr\]and hydrolysis gives
  A)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  {{C}_{2}}{{H}_{5}} \end{smallmatrix}}{\mathop{C}}\,=O\]
  done clear
  B)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  {{C}_{2}}{{H}_{5}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  {{C}_{2}}{{H}_{5}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-OH\]
  done clear
  C)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=\]
  done clear
  D)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  {{C}_{2}}{{H}_{5}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-OH\]
  done clear
  View Answer play_arrow

• question_answer90) Williamson's synthesis is used to prepare
  A)
   bakelite              
  done clear
  B)
   PVC
  done clear
  C)
    acetone            
  done clear
  D)
   diethyl ether
  done clear
  View Answer play_arrow

• question_answer91) Glucose has following functional group
  A)
   aldehyde
  done clear
  B)
   aldehyde and alcohol
  done clear
  C)
    alcohol
  done clear
  D)
   keton and alcohol
  done clear
  View Answer play_arrow

• question_answer92) Natural rubber is a polymer of
  A)
   cis-isoprene
  done clear
  B)
   trans-isoprene
  done clear
  C)
   co-cis and trans isoprene
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer93) The  IUPAC  name  for the  formula \[C{{H}_{3}}\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}\,=\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}\,COOH\]is
  A)
   2-methyl-2-butenoic acid
  done clear
  B)
   3-methyl-3-butenoic acid
  done clear
  C)
   3-metyl-2-butenoic acid
  done clear
  D)
   2-methyl-3-butenoic acid
  done clear
  View Answer play_arrow

• question_answer94) When\[NaCl\]is dissolved in water, the sodium ions becomes
  A)
   oxidised             
  done clear
  B)
   reduced
  done clear
  C)
   hydrolysed      
  done clear
  D)
   hydrated
  done clear
  View Answer play_arrow

• question_answer95) pH of a solution can be expressed as
  A)
  \[-{{\log }_{e}}[{{H}^{+}}]\]        
  done clear
  B)
  \[-{{\log }_{10}}[{{H}^{+}}]\]
  done clear
  C)
    \[{{\log }_{e}}[{{H}^{+}}]\]        
  done clear
  D)
  \[{{\log }_{10}}[{{H}^{+}}]\]
  done clear
  View Answer play_arrow

• question_answer96) An element with atomic number 84 and mass number 218 loses one a-particle and two\[\beta -\] particles in three successive stages. The resulting element will have
  A)
   at. no. 84 and mass no. 214
  done clear
  B)
   at no. 82 and mass no. 214
  done clear
  C)
    at. no. 84 and mass no. 218
  done clear
  D)
   at. no. 82 and mass no. 218
  done clear
  View Answer play_arrow

• question_answer97) Ostwald process is used for the manufacture of
  A)
   nitric acid           
  done clear
  B)
   sulphuric acid
  done clear
  C)
   ammonia           
  done clear
  D)
   bleaching powder
  done clear
  View Answer play_arrow

• question_answer98) Which of the following is used as a moderator in nuclear reactors?
  A)
   Hard water
  done clear
  B)
   Heavy water
  done clear
  C)
    Non-ionised water
  done clear
  D)
   Mineral water
  done clear
  View Answer play_arrow

• question_answer99) Which defect causes decrease in the density of crystal?
  A)
   Frenkel               
  done clear
  B)
   Schottky
  done clear
  C)
   Interstitial         
  done clear
  D)
   F-centre
  done clear
  View Answer play_arrow

• question_answer100) For a dilute solution, Raoulfs law states that
  A)
   the lowering of vapour pressure is equal to mole fraction of solute
  done clear
  B)
   the relative lowering of vapour pressure is equal to mole fraction of solute
  done clear
  C)
    the relative lowering of vapour pressure is proportional to the amount of solute in solution
  done clear
  D)
   the vapour pressure of the solution is equal to the mole fraction of solvent
  done clear
  View Answer play_arrow

• question_answer101) A gaseous mixture contains\[56g{{N}_{3}},44gC{{O}_{2}}\] and\[16gC{{H}_{4}}\]. The total pressure of the mixture is 720 mm Hg. What is the partial pressure of\[C{{H}_{4}}\]?
  A)
   142mm                               
  done clear
  B)
   156mm
  done clear
  C)
    182mm                              
  done clear
  D)
   180mm
  done clear
  View Answer play_arrow

• question_answer102) The chemical used for cooling in refrigerators is
  A)
  \[C{{O}_{2}}\]                                   
  done clear
  B)
  \[N{{H}_{4}}OH\]
  done clear
  C)
  \[N{{H}_{4}}Cl\]               
  done clear
  D)
   liquid\[N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer103) Structure of\[(Si{{O}_{4}})\]ion is
  A)
   tetrahedral      
  done clear
  B)
   square planar
  done clear
  C)
   octahedral        
  done clear
  D)
   planar triangular
  done clear
  View Answer play_arrow

• question_answer104) When\[S{{O}_{2}}\]gas is passed through an acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]solution
  A)
   the solution becomes blue
  done clear
  B)
  \[S{{O}_{2}}\]gets reduced
  done clear
  C)
  \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]is formed
  done clear
  D)
   the solution becomes colorless
  done clear
  View Answer play_arrow

• question_answer105) Which oxide of nitrogen is coloured gas?
  A)
  \[{{N}_{2}}O\]                                  
  done clear
  B)
  \[N{{O}_{2}}\]
  done clear
  C)
   \[{{N}_{2}}{{O}_{5}}\]                                  
  done clear
  D)
  \[NO\]
  done clear
  View Answer play_arrow

• question_answer106) In the following reaction, \[{{p}_{4}}+3NaOH+3{{H}_{2}}O\xrightarrow{{}}P{{H}_{3}}+3Na{{H}_{2}}P{{O}_{2}}\]
  A)
   phosphorus is oxidized
  done clear
  B)
   phosphorus is oxidised and reduced
  done clear
  C)
   phosphorus is reduced
  done clear
  D)
   sodium is oxidized
  done clear
  View Answer play_arrow

• question_answer107) The linear molecule is
  A)
  \[C{{H}_{4}}\]                                   
  done clear
  B)
  \[{{C}_{2}}{{H}_{2}}\]
  done clear
  C)
   \[N{{H}_{3}}\]                                 
  done clear
  D)
  \[{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer108) Which of the following can exhibit keto-enol tautomerism?
  A)
  \[H-\underset{\begin{smallmatrix}  |\,\,| \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]
  done clear
  B)
  \[{{(C{{H}_{3}})}_{3}}C-\underset{\begin{smallmatrix}  |\,\,| \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]
  done clear
  C)
   \[C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  |\,\,| \end{smallmatrix}}{\mathop{C}}\,-H\]
  done clear
  D)
   \[CC{{l}_{3}}-\underset{\begin{smallmatrix}  |\,\,| \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]
  done clear
  View Answer play_arrow

• question_answer109) Which of the following will show aromatic behaviour?
  A)
                   
  done clear
  B)
   
  done clear
  C)
                                  
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer110) The increasing order of acidity is
  A)
  \[CHC{{l}_{2}}COOH<C{{H}_{2}}ClCOOH<C{{H}_{3}}COOH\]
  done clear
  B)
  \[C{{H}_{3}}COOH<CHC{{l}_{2}}COOH<C{{H}_{2}}ClCOOH\]
  done clear
  C)
   \[C{{H}_{2}}BrCOOH<C{{H}_{2}}ClCOOH<C{{H}_{2}}ClCOOH\]
  done clear
  D)
   \[C{{H}_{2}}BrCOOH<C{{H}_{2}}ClCOOH<CHC{{l}_{2}}COOH\]
  done clear
  View Answer play_arrow

• question_answer111) Cannizaro's reaction is exhibited by
  A)
  (a \[HCHO\]                                       
  done clear
  B)
  \[C{{H}_{3}}CHO\]
  done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}CHO\]    
  done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\]
  done clear
  View Answer play_arrow

• question_answer112) The temporary hardness of water due to calcium bicarbonate can be removed by adding
  A)
  \[CaC{{O}_{3}}\]                              
  done clear
  B)
  \[Ca{{(OH)}_{2}}\]
  done clear
  C)
  \[CaC{{l}_{2}}\]                                
  done clear
  D)
  \[HCl\]
  done clear
  View Answer play_arrow

• question_answer113) Which one does not form oxide on heating?
  A)
  \[ZnC{{O}_{3}}\]                              
  done clear
  B)
  \[CaC{{O}_{3}}\]
  done clear
  C)
   \[L{{i}_{2}}C{{O}_{3}}\]                                
  done clear
  D)
  \[N{{a}_{2}}C{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer114) The purpose of smelting an ore is to
  A)
   oxidise it
  done clear
  B)
   reduce it
  done clear
  C)
    obtain an alloy
  done clear
  D)
   separate volatile impurities
  done clear
  View Answer play_arrow

• question_answer115) Which of the following inert gas liquefies easily?
  A)
  \[He\]                                  
  done clear
  B)
  \[Kr\]
  done clear
  C)
  \[Ne\]                                  
  done clear
  D)
   \[Ar\]
  done clear
  View Answer play_arrow

• question_answer116) White lung cancer is caused by
  A)
   asbestos            
  done clear
  B)
   silica
  done clear
  C)
    paper                                 
  done clear
  D)
   textiles
  done clear
  View Answer play_arrow

• question_answer117) The crystal system of a compound with unit cell dimensions,\[a=0.387,\text{ }b=0.387\]and\[c=\]\[0.504\text{ }nm\]and\[\alpha =\beta =90{}^\circ \]and\[\gamma =120{}^\circ \]is
  A)
   cubic
  done clear
  B)
   hexagonal
  done clear
  C)
    orthorhombic
  done clear
  D)
   rhombohedral
  done clear
  View Answer play_arrow

• question_answer118) Tincture of iodine is
  A)
   aqueous solution of\[{{I}_{2}}\]
  done clear
  B)
   solution of\[{{I}_{2}}\]in aqueous\[KI\]
  done clear
  C)
    alcoholic solution of\[{{I}_{2}}\]
  done clear
  D)
   aqueous solution of\[KI\]
  done clear
  View Answer play_arrow

• question_answer119) Invert sugar is a mixture of
  A)
   glucose and fructose
  done clear
  B)
   glucose and lactose
  done clear
  C)
    glucose and galactose
  done clear
  D)
   only glucose
  done clear
  View Answer play_arrow

• question_answer120) An organic substance containing carbon, hydrogen and oxygen gave the following percentage composition. \[C=40.687%;\text{ }H=5.085%\text{ }and\text{ }O=54.228%\] What is the empirical formula of the compound?
  A)
  \[C{{H}_{3}}O\]                                
  done clear
  B)
  \[{{C}_{2}}{{H}_{2}}O\]
  done clear
  C)
    \[C{{H}_{4}}O\]                              
  done clear
  D)
  \[{{C}_{2}}{{H}_{3}}{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer121) Acromegaly is due to hyper secretion of
  A)
   insulin                                 
  done clear
  B)
   thyroxine
  done clear
  C)
   growth hormone           
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer122) Cessation of menstrual cycle in women is called
  A)
   menopause     
  done clear
  B)
   lactation
  done clear
  C)
    ovulation          
  done clear
  D)
   parturition
  done clear
  View Answer play_arrow

• question_answer123) Barr-body in mammals represents
  A)
   one of the two X-chromosomes in the cells of female
  done clear
  B)
   all heterochromatin of male and female cells                    
  done clear
  C)
   Y-chromosome of male
  done clear
  D)
   all heterochromatin of female cells
  done clear
  View Answer play_arrow

• question_answer124) Discontinuous variations are
  A)
   essential features        
  done clear
  B)
   acquired character      
  done clear
  C)
    non-essential changes   
  done clear
  D)
   mutations
  done clear
  View Answer play_arrow

• question_answer125) Fifth cranial nerve of frog is called
  A)
   vagus                                  
  done clear
  B)
   trigeminal
  done clear
  C)
    optic                                   
  done clear
  D)
   ophthalmic
  done clear
  View Answer play_arrow

• question_answer126) Which of the following is made up of a single bone in mammals?
  A)
   Dentary              
  done clear
  B)
   Hyoid
  done clear
  C)
   Upper jaw         
  done clear
  D)
   All of these
  done clear
  View Answer play_arrow

• question_answer127) The maintenance of internal favourable                conditions by a self-regulated mechanisms in spite of the fact that there are changes in           environment, is known as
  A)
   entropy              
  done clear
  B)
   enthalpy
  done clear
  C)
   homeostasis                    
  done clear
  D)
   steady state
  done clear
  View Answer play_arrow

• question_answer128) If frog's brain is crushed, even then its leg moves on pinpointing. It is called
  A)
   simple reflex
  done clear
  B)
   conditional reflex
  done clear
  C)
    neurotransmitter function
  done clear
  D)
   autonomic nerve condition
  done clear
  View Answer play_arrow

• question_answer129) Gemmule formation in sponges are useful in     
  A)
   asexual reproduction
  done clear
  B)
   sexual reproduction
  done clear
  C)
    parthenogenesis
  done clear
  D)
   parthenocarpy
  done clear
  View Answer play_arrow

• question_answer130) Which of the following is not a mental disorder?
  A)
   Epilepsy             
  done clear
  B)
   Neurosis
  done clear
  C)
   Psychosis           
  done clear
  D)
   Plague
  done clear
  View Answer play_arrow

• question_answer131) Brunner's glands are present in
  A)
   duodenum       
  done clear
  B)
   oesophagus
  done clear
  C)
    ileum                                  
  done clear
  D)
   stomach
  done clear
  View Answer play_arrow

• question_answer132) Sella turcica is found      
  A)
   near pituitary                   
  done clear
  B)
   m bones
  done clear
  C)
   in joints              
  done clear
  D)
   near thyroid
  done clear
  View Answer play_arrow

• question_answer133) Spindle fibres of mitotic cell are made up of
  A)
   tubulin                
  done clear
  B)
   actin
  done clear
  C)
   myosin               
  done clear
  D)
   collagen
  done clear
  View Answer play_arrow

• question_answer134) Systemic heart refers to
  A)
   entire heart in lower vertebrates
  done clear
  B)
   the two ventricles together in humans
  done clear
  C)
    the heart that contracts under stimulation
  done clear
  D)
   from nervous system left auricle and left ventricle in higher vertebrates
  done clear
  View Answer play_arrow

• question_answer135) Chromosomes in a bacterial cell can be 1 to 3 in
  A)
   number and can be either circular or Linear, but never both within the same cell
  done clear
  B)
   can be circular as well as linear within the same cell
  done clear
  C)
   are always circular
  done clear
  D)
   are always linear
  done clear
  View Answer play_arrow

• question_answer136) The linkage map of X-chromosome of fruit-fly has 66 units, with yellow body gene (y) at one end and bobbed hair  gene at the other end. The recombination frequency between                these two genes (y and b) should be
  A)
   50%                                      
  done clear
  B)
   100%
  done clear
  C)
   66%                                      
  done clear
  D)
   50%
  done clear
  View Answer play_arrow

• question_answer137) In Drosophila, the sex is determined by
  A)
   the ratio of pairs of X-chromosomes to the pairs of autosomes
  done clear
  B)
   whether the egg is fertilised or develops parthenogenetically
  done clear
  C)
    the ratio of number of X-chromosomes to the set of autosomes
  done clear
  D)
   X and Y-chromosomes
  done clear
  View Answer play_arrow

• question_answer138) Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito bome infectious disease?
  A)
   Pernicious anaemia
  done clear
  B)
   Leukaemia
  done clear
  C)
    Thalassaemia
  done clear
  D)
   Sickle cell anaemia
  done clear
  View Answer play_arrow

• question_answer139) Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorised as
  A)
   cellular immunity
  done clear
  B)
   innate non-specific immunity
  done clear
  C)
    active immunity
  done clear
  D)
   passive immunity
  done clear
  View Answer play_arrow

• question_answer140) Bartholin's glands are situated
  A)
   on either side of vagina in humans
  done clear
  B)
   on either side of vas deferens in humans
  done clear
  C)
    on the sides of the head of some amphibians
  done clear
  D)
   at the reduced tail end of birds
  done clear
  View Answer play_arrow

• question_answer141) 'Bundle of His' is a network of
  A)
   nerve fibres distributed in ventricles
  done clear
  B)
   nerve fibres found throughout the heart
  done clear
  C)
   muscle fibres distributed throughout the heart walls
  done clear
  D)
   muscle fibres found only in the ventricle wall
  done clear
  View Answer play_arrow

• question_answer142) Which one of the following contains the largest quantity of extracellular material?
  A)
   Stratified epithelium
  done clear
  B)
   Myelinated nerve fibres
  done clear
  C)
    Striated muscle
  done clear
  D)
   Areolar tissue
  done clear
  View Answer play_arrow

• question_answer143) During its life cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages   respectively
  A)
   metacercaria and ceracaria
  done clear
  B)
   miracidium and metacercaria
  done clear
  C)
   redia and miracidium
  done clear
  D)
   cercaria and redia
  done clear
  View Answer play_arrow

• question_answer144) During prolonged fasting, in what sequence are the following organic compounds used up by the body?
  A)
  First carbohydrates, next proteins and lastly lipids
  done clear
  B)
   First proteins, next lipids and lastly carbohydrates
  done clear
  C)
    First carbohydrates, next fats and lastly proteins
  done clear
  D)
   First fats, next carbohydrates and lastly proteins
  done clear
  View Answer play_arrow

• question_answer145) If Henle's loop were absent from mammalian nephron, which of the following is to be expected?
  A)
   The urine will be more concentrated
  done clear
  B)
   The urine will be more dilute
  done clear
  C)
    There will be no urine formation
  done clear
  D)
   There will be hardly any change in the quality and quantity of urine formed
  done clear
  View Answer play_arrow

• question_answer146) Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of a normal father would be affected by this disorder?
  A)
   50%                                      
  done clear
  B)
   25%
  done clear
  C)
   100%                                   
  done clear
  D)
   75%
  done clear
  View Answer play_arrow

• question_answer147) Genetic map is one that
  A)
   shows the stages during the cell division
  done clear
  B)
   shows the distribution of various species in a region
  done clear
  C)
   establishes sites of the genes on a chromosome
  done clear
  D)
   establishes the various stages in gene evolution
  done clear
  View Answer play_arrow

• question_answer148) Sycon belongs to a group of animals which are  best described as
  A)
   multicellular with a gastrovascular system
  done clear
  B)
   multicellular having tissue organisation, but no body cavity
  done clear
  C)
   unicellular or acellular
  done clear
  D)
   multicellular    without    any   tissue        organization
  done clear
  View Answer play_arrow

• question_answer149) The chief advantage of encystment of an Amoeba is
  A)
   protection from parasites and predators
  done clear
  B)
   the chance to get rid of accumulated waste products
  done clear
  C)
   the ability to survive during adverse       physical conditions
  done clear
  D)
   the ability to live for sometime without ingesting food
  done clear
  View Answer play_arrow

• question_answer150) Christmas disease in another name for
  A)
   Down's syndrome         
  done clear
  B)
   sleeping sickness
  done clear
  C)
   haemophilia-B                 
  done clear
  D)
   hepatitis-B
  done clear
  View Answer play_arrow

• question_answer151) Pollorum disease of poultry is caused by
  A)
   Mycobacterium              
  done clear
  B)
   Salmonella
  done clear
  C)
   Clostridium                       
  done clear
  D)
   Haemophilus
  done clear
  View Answer play_arrow

• question_answer152) Which of the following is a single membranous structure?
  A)
   Lysosome                          
  done clear
  B)
   Nucleus
  done clear
  C)
   Mitochondria                   
  done clear
  D)
   Chloroplast
  done clear
  View Answer play_arrow

• question_answer153) Nodules with nitrogen-fixing bacteria are found in
  A)
   cotton                                 
  done clear
  B)
   gram
  done clear
  C)
   mustard                             
  done clear
  D)
   wheat
  done clear
  View Answer play_arrow

• question_answer154) Major protein of connective tissue is
  A)
   myosin                               
  done clear
  B)
   collagen
  done clear
  C)
    melanin                             
  done clear
  D)
   keratin
  done clear
  View Answer play_arrow

• question_answer155) Desert can be convened into green land by planting
  A)
   oxylophytes                     
  done clear
  B)
   psammophytes
  done clear
  C)
   halophytes                       
  done clear
  D)
   trees
  done clear
  View Answer play_arrow

• question_answer156) Powdery mildew of crops are caused by
  A)
   bacteria                              
  done clear
  B)
   Ascomycetes
  done clear
  C)
   Basidiomycetes              
  done clear
  D)
   Phycomycetes
  done clear
  View Answer play_arrow

• question_answer157) Minamata disease is pollution related disease- It result from
  A)
    oil spills in sea
  done clear
  B)
   DDT pollution
  done clear
  C)
   release of industrial waste containing mercury in fishing water
  done clear
  D)
   accumulation of arsenic
  done clear
  View Answer play_arrow

• question_answer158) Deforestation causes
  A)
   soil erosion      
  done clear
  B)
   soil pollution
  done clear
  C)
    noise pollution               
  done clear
  D)
   air pollution
  done clear
  View Answer play_arrow

• question_answer159) Blackman's law of limiting factor is applied to
  A)
   respiration                        
  done clear
  B)
   transpiration
  done clear
  C)
    photorespiration           
  done clear
  D)
   photosynthesis
  done clear
  View Answer play_arrow

• question_answer160) Funaria gametophyte is
  A)
   dioecious
  done clear
  B)
   heteroecious
  done clear
  C)
    autoecious
  done clear
  D)
   monoecious and autoecious
  done clear
  View Answer play_arrow

• question_answer161) The usage of binomial names, for plant species was accepted by all after the publication of the work by
  A)
   Hooker                               
  done clear
  B)
   Linnaeus
  done clear
  C)
    Bentham                          
  done clear
  D)
   Darwin
  done clear
  View Answer play_arrow

• question_answer162) Abundance of a species in a population, within habitat is called
  A)
   niche density                   
  done clear
  B)
   absolute density
  done clear
  C)
    relative density              
  done clear
  D)
   geographic density
  done clear
  View Answer play_arrow

• question_answer163) A prokaryotic cell lacks
  A)
   true nucleus
  done clear
  B)
   nuclear membrane
  done clear
  C)
    membrane bound organelles
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer164) Mirabilis jalapa shows
  A)
   codominance
  done clear
  B)
   incomplete dominance
  done clear
  C)
   dominance
  done clear
  D)
   complementary genes
  done clear
  View Answer play_arrow

• question_answer165) Induction of cell division and delay in senescence is done by
  A)
   cytokinins                          
  done clear
  B)
   auxins
  done clear
  C)
   GA                                        
  done clear
  D)
   Co-A
  done clear
  View Answer play_arrow

• question_answer166) In genetic engineering, which of the following is used?
  A)
   Plasmid                              
  done clear
  B)
   Ptasrid
  done clear
  C)
   Mitochondria                   
  done clear
  D)
   ER
  done clear
  View Answer play_arrow

• question_answer167) Which of the following plants are used as green manure in crop fields and in sandy soils?
  A)
   Saccharum munja and Lantana camara
  done clear
  B)
   Dichanthium annulatum and Azolla nilotica
  done clear
  C)
    Crotalaria juncea and Alhagi camelorum
  done clear
  D)
   Calotropis procera and Phyllanthus niruri
  done clear
  View Answer play_arrow

• question_answer168) The aleurone layer in maize grain is specially rich in
  A)
   lipids                                    
  done clear
  B)
   auxins
  done clear
  C)
   proteins                             
  done clear
  D)
   starch
  done clear
  View Answer play_arrow

• question_answer169) In a flowering plant, archesporium gives rise to
  A)
   wall and tapetum
  done clear
  B)
   only tapetum and sporogenous cells
  done clear
  C)
   only wall of the sporangium
  done clear
  D)
   both wall and sporogenous cells
  done clear
  View Answer play_arrow

• question_answer170) In which kingdom, would you classify the archaea and nitrogen-fixing organisms. If the five-kingdom system of classification is used?
  A)
   Protista                              
  done clear
  B)
   Monera
  done clear
  C)
   Plantae                               
  done clear
  D)
   Fungi
  done clear
  View Answer play_arrow

• question_answer171) In sngarcane plant, \[^{14}C{{O}_{2}}\]is fixed in a malic acid, in which the enzyme that Fixes \[C{{O}_{2}}\]is
  A)
   ribulose phosphate kinase
  done clear
  B)
   fructose phosphatase
  done clear
  C)
    ribulose hiphosphate carboxylase
  done clear
  D)
   phosphoenol pyruvic acid carboxylase
  done clear
  View Answer play_arrow

• question_answer172) Which one of the following is wrong in relation to photorespiration?
  A)
   It is a characteristic of \[{{\text{C}}_{\text{4}}}\text{-}\]plants
  done clear
  B)
   It is a characteristic of \[{{\text{C}}_{3}}\text{-}\]plants
  done clear
  C)
    It occurs in chloroplasts
  done clear
  D)
   It occurs in daytime only
  done clear
  View Answer play_arrow

• question_answer173) During translation initiation in prokaryotes, a GTP molecule is needed in
  A)
   association   of  30S,   mRNA with formyl-met-tRNA
  done clear
  B)
   association of 50S subunit of ribosome with initiation complex
  done clear
  C)
   formation of formyl-met-tRNA
  done clear
  D)
   binding of 30S subunit of ribosome with mRNA
  done clear
  View Answer play_arrow

• question_answer174) In the generic code dictionary, how many codons are used to code for all the 20 essential amino acids?
  A)
   61                                           
  done clear
  B)
   60
  done clear
  C)
    20                                          
  done clear
  D)
   64
  done clear
  View Answer play_arrow

• question_answer175) Stomata of CAM plants
  A)
   open during the night and close during the day
  done clear
  B)
   never open
  done clear
  C)
    are always open
  done clear
  D)
   open during the day and close at night
  done clear
  View Answer play_arrow

• question_answer176) Which one of the following bacteria has found extensive use in genetic engineering work in plants?
  A)
   Bacillus coagulens
  done clear
  B)
   Agrobacterium tumefaciens
  done clear
  C)
    Clostridium septicum
  done clear
  D)
   Xanthomonas citri
  done clear
  View Answer play_arrow

• question_answer177) Which one of the following is categorised under living fossils?
  A)
   Selaginella                         
  done clear
  B)
   Metasequoia
  done clear
  C)
   Pinus                                   
  done clear
  D)
   Cycos
  done clear
  View Answer play_arrow

• question_answer178) Mycorrhiza is an example of
  A)
   endoparasitism               
  done clear
  B)
   decomposers
  done clear
  C)
   symbiotic relationship  
  done clear
  D)
   ectoparasitism
  done clear
  View Answer play_arrow

• question_answer179) Chlorenchyma is known to develop in the
  A)
   spore capsule of a moss
  done clear
  B)
   pollen tube of Pinus
  done clear
  C)
   cytoplasm of Chlorella
  done clear
  D)
   mycellium of a green mould such a Aspergillus
  done clear
  View Answer play_arrow

• question_answer180) Boron in green plants assists in
  A)
   Photosynthesis
  done clear
  B)
   sugar transport
  done clear
  C)
  activation of enzymes
  done clear
  D)
  acting as enzyme cofactor
  done clear
  View Answer play_arrow