KVPY Sample Paper

done KVPY Stream-SX Model Paper-9 Total Questions - 120    [Download]

• question_answer1)
  The locus of the centre of a circle, which touches the circles \[\left| z-{{z}_{1}} \right|=a\] and \[\left| z-{{z}_{2}} \right|=b\] externally can be
  A)
  an ellipse
  done clear
  B)
  a hyperbola
  done clear
  C)
  a circle
  done clear
  D)
  parabola
  done clear
  View Answer play_arrow

• question_answer2)
  Let \[f(x)=\left\{ \begin{align}   & {{\cot }^{-1}}x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\  & \frac{1}{2}\left| x \right|+\frac{\pi }{4}-\frac{1}{2},\,\,\, \\ \end{align} \right.\begin{matrix}    \left| x \right|\ge 1  \\    \left| x \right|<1'  \\ \end{matrix}\] the number of points which domain of \[f\left( x \right)\]does not contain is
  A)
  one
  done clear
  B)
  two
  done clear
  C)
  three
  done clear
  D)
  none of these 
  done clear
  View Answer play_arrow

• question_answer3)
  Which of the following number (s) is are rational?
  A)
  \[\sin \,15{}^\circ \]                  
  done clear
  B)
  \[\cos 15{}^\circ \]
  done clear
  C)
  \[sin\,15{}^\circ \,\cos 15{}^\circ \]
  done clear
  D)
  \[sin\,15{}^\circ \,\cos 75{}^\circ \]
  done clear
  View Answer play_arrow

• question_answer4)
  From a fixed point \[A\] on the circumference of a circle of radius \[r,\] the perpendicular \[AY\] is let fall on the tangent at \[P.\] the maximum area of the triangle \[APY\]is
  A)
  \[{{r}^{2}}\]
  done clear
  B)
  \[\frac{3\sqrt{3}}{4}{{r}^{2}}\]
  done clear
  C)
  \[\frac{3\sqrt{3}}{8}{{r}^{2}}\]
  done clear
  D)
  \[\sqrt{3{{r}^{2}}}\]
  done clear
  View Answer play_arrow

• question_answer5)
  Let \[f:R\to R\] be a function defined by \[f(x)\,=min\left\{ x+1,\left| x \right|+1 \right\},\] then which of the following is true?
  A)
  \[f(x)\]is differentiable everywhere
  done clear
  B)
  \[f(x)\]is not differentiable at x=0
  done clear
  C)
  \[f(x)\ge \]1 for all x\[\in \]\[R\]
  done clear
  D)
  \[f(x)\]is not differentiable at x=1
  done clear
  View Answer play_arrow

• question_answer6)
  \[let\,f:\mathbb{R}\to \mathbb{R},g:\mathbb{R}\to \mathbb{R}\] and h:\[\mathbb{R}\to \mathbb{R}\,\]be differentiable functions such that \[f(x)\,={{x}^{3}}+3x+2,\] g(f(x))=x  and h (g(g(x)))=x  for all x\[\in \mathbb{R}.\] then, which of the following is correct.
  A)
  \[g'(2)=\frac{1}{15}\]
  done clear
  B)
  \[h'(1)=666\]
  done clear
  C)
  \[h(g(3))=36\]                
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer7)
  Two points \[P\]and \[Q\] are taken on the line joining the points \[A\](0, 0) and \[B\](3a, 0) such that \[AP=PQ=QB.\]circle are drawn on \[AP,PQ\,\,and\,\,QB\] as diameters. The locus of the points \[S,\]the sum of the squares of the tangents from which to the three circle is equal to \[{{b}^{2}},\]is
  A)
  \[{{x}^{2}}+{{y}^{2}}-3ax+2{{a}^{2}}-{{b}^{2}}=0\]
  done clear
  B)
  \[3({{x}^{2}}+{{y}^{2}})-9ax+8{{a}^{2}}-{{b}^{2}}=0\]
  done clear
  C)
    \[{{x}^{2}}+{{y}^{2}}-5ax+6{{a}^{2}}-{{b}^{2}}=0\]
  done clear
  D)
  \[{{x}^{2}}+{{y}^{2}}-ax-{{b}^{2}}=0\]
  done clear
  View Answer play_arrow

• question_answer8)
  The  matrices  \[\left[ \begin{matrix}    \cos \theta  & -\sin \theta   \\    \sin \theta  & \cos \theta   \\ \end{matrix} \right]\] and  \[\left[ \begin{matrix}    a & 0  \\    0 & b  \\ \end{matrix} \right]\] commute under multiplication
  A)
  if \[a=b\]or\[\theta =n\pi ,\]where is an integer
  done clear
  B)
  Always
  done clear
  C)
  Never
  done clear
  D)
  if \[a\,\cos \theta \ne b\sin \theta \]
  done clear
  View Answer play_arrow

• question_answer9)
  Let P=\[\left\{ \theta :\sin \theta -\cos \,\theta \sqrt{2}\cos \theta  \right\}\]and \[\left\{ \theta :\sin \theta +\cos \,\theta \sqrt{2}\sin \theta  \right\}\]be two sets. Then
  A)
  \[P\subset Q\,and\,Q-P\ne \phi \]
  done clear
  B)
  \[Q\subset P\]
  done clear
  C)
  \[P\subset Q\]
  done clear
  D)
  \[P=Q\]
  done clear
  View Answer play_arrow

• question_answer10)
  If the focus of parabola  \[{{(y-k)}^{2}}=4(x-h)\]always lies between the lines \[x+y=1\]and \[x+y=3\]then
  A)
  \[0<h+k<2\]    
  done clear
  B)
  \[0<h+k<1\]
  done clear
  C)
  \[1<h+k<2\]                
  done clear
  D)
  \[1<h+k<3\]
  done clear
  View Answer play_arrow

• question_answer11)
  Let us define a region \[R\]in \[xy-\]plane as a set of points \[(x,y)\]satisfying \[\left[ {{x}^{2}} \right]\]=\[\left[ y \right]\](where \[\left[ x \right]\]denotes greatest integer \[\le x),\]then the region \[R\]defines
  A)
  a parabola whose axis is horizontal
  done clear
  B)
  a parabola whose axis is vertical
  done clear
  C)
  Integer point of the parabola \[y={{x}^{2}}\]
  done clear
  D)
  none of the these
  done clear
  View Answer play_arrow

• question_answer12)
  The change that doctor A will diagnose disease X correctly is \[60%\]the change that a patient of doctor A dies after correct treatment is\[~75%\]while it is \[80%\]after wrong Diagnosis. A patient of doctor A having disease X dies. The probability that his disease  is correctly diagnosed is
  A)
  \[\frac{8}{17}\]                         
  done clear
  B)
  \[\frac{9}{17}\]
  done clear
  C)
  \[\frac{11}{17}\]                                   
  done clear
  D)
  \[\frac{6}{17}\]
  done clear
  View Answer play_arrow

• question_answer13)
  Let \[f:\left\{ x,y,z \right\}\to \left\{ 1,2,3 \right\}\]be a one -one mapping such that only one of the following three statements is true and remaining two are false \[f(x)\ne 2,f(y)=3,f(z)\ne 1,then\]
  A)
  \[f(x)>f(y)>f(z)\]
  done clear
  B)
  \[f(x)<f(y)<f(z)\]
  done clear
  C)
  \[f(y)<f(x)<f(z)\]
  done clear
  D)
  \[f(y)<f(z)<f(x)\]
  done clear
  View Answer play_arrow

• question_answer14)
  For hyperbola \[\frac{{{x}^{2}}}{{{\cos }^{2}}\alpha }-\frac{{{y}^{2}}}{{{\sin }^{2}}\alpha }=1\]which of the following remains constant with change in \['\alpha '\]
  A)
  abscissae of vertices
  done clear
  B)
  abscissae of foci
  done clear
  C)
  Eccentricity                   
  done clear
  D)
  directrix
  done clear
  View Answer play_arrow

• question_answer15)
  The equation \[2\,{{\cos }^{2}}\frac{x}{2}{{\sin }^{2}}x={{x}^{2}}+{{x}^{-2}}\]\[0<x\le \frac{\pi }{2}\] has
  A)
  No real solution
  done clear
  B)
  One real solution
  done clear
  C)
  More than one solution
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer16)
  The value of \[\int{\left[ 2\sin x \right]}\,dx\,where\left[ . \right]\]represents the greatest integer function is
  A)
  \[\frac{-5\pi }{3}\]                     
  done clear
  B)
  \[-\pi \]
  done clear
  C)
  \[\frac{5\pi }{3}\]          
  done clear
  D)
  \[-2\pi \]
  done clear
  View Answer play_arrow

• question_answer17)
  \[\begin{align}   & if\,f(x)={{x}^{3}}+3{{x}^{2}}+6x+2\sin x,then\,\,the\, \\  & equation\frac{1}{x-f(1)}+\frac{2}{x-f(2)}+\frac{3}{x-f(3)}=0\,has \\ \end{align}\]
  A)
  No real roots     
  done clear
  B)
  1real root
  done clear
  C)
  2real roots
  done clear
  D)
  more than 2real roots
  done clear
  View Answer play_arrow

• question_answer18)
   If \[f\]and \[g\]are two continuous functions being even and odd respectively,  then\[\int\limits_{-a}^{a}{\frac{f(x)}{{{b}^{g(x)}}+1}dx}\]is equal to (a being any non-zero number and \[b\] is positive real number,\[b\ne 1\])
  A)
  Independent of \[f\]        
  done clear
  B)
  Independent of  \[g\]
  done clear
  C)
  Independent of both f and g
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer19)
  Let \[f(x)={{a}^{x}}(a>0)\] be written as \[f(x)=g(x)\,+h(x)\] where \[g(x)\,\] is an even function and \[h(x)\] is an odd function. Then the value of \[g(x+y)+g(x-y)\] is
  A)
  \[2g(x)\,g(y)\]                 
  done clear
  B)
  \[2g(x+y)\,g(x-y)\]
  done clear
  C)
  \[2g(x)\]            
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer20)
  A determinant of the second order is made with the elements 0and 1. If \[\frac{m}{n}\]be the probability that the determinant made is non-negative, where m and n are relative primes, then the value of m-n is
  A)
  4
  done clear
  B)
  3
  done clear
  C)
  5
  done clear
  D)
  8
  done clear
  View Answer play_arrow

• question_answer21)

  A fixed container is filled with a piston which is attached to a spring of spring constant k. The other end of the spring is attached to a rigid wall. Initially the spring is in its natural length and the length of container between the piston and its side wall.is L. Now an ideal diatomic gas is slowly filled in the container so that the piston moves quasistatically. If pushed the piston by x so that the spring now is compressed by x. The total rotation kinetic energy of the gas molecules in terms of the displacement x of the piston is (there is vacuum outside the container)

  A)
  \[k\times L\]
  done clear
  B)
  \[4k\times L\]
  done clear
  C)
  \[k\times (x+L)\]
  done clear
  D)
  \[\frac{2k{{x}^{2}}}{L}\]
  done clear
  View Answer play_arrow

• question_answer22)
  A battery of internal resistance \[2\,\Omega \] is connected to a variable resistor whose value can vary from \[1\,\Omega \] to \[10\,\Omega \] the resistance is initially set at \[4\,\Omega \,.\] If the resistance is now increased then
  A)
  Power consumed by it will decrease
  done clear
  B)
  Power consumed by it will increase
  done clear
  C)
  Power consumed by it may increase or may decrease
  done clear
  D)
  Power consumed will first increase then decrease.
  done clear
  View Answer play_arrow

• question_answer23)
  Two identical spheres of same mass and specific gravity (which is the ratio of density of a substance and density of water) 2.4 have different charges of Q and\[-\,3\,Q\]. They are suspended from two string of same length \[\ell \] fixed to points at the same horizontal level, but distant \[\ell \] from each other. When the entire set up is transferred inside a liquid of specific gravity 0.8, it is observed that the inclination of each string in equilibrium remains unchanged. Then the dielectric constant of the liquid is
  A)
  2
  done clear
  B)
  3
  done clear
  C)
  1.5
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer24)
  Total electric force on an electric dipole placed in an electric field of a point charge is:
  A)
  always zero
  done clear
  B)
  never zero
  done clear
  C)
  zero when mid point of dipole coincides with the point charge
  done clear
  D)
  zero when dipole axis is along any electric line of force.
  done clear
  View Answer play_arrow

• question_answer25)
  The resultant amplitude due to superposition of two waves \[{{y}_{1}}=5\sin \,(wt-kx)\] and \[{{y}_{2}}=-\,5\cos \,(wt-kx-150{}^\circ )\]
  A)
  5
  done clear
  B)
  \[5\sqrt{3}\]
  done clear
  C)
  \[5\sqrt{2-\sqrt{3}}\]
  done clear
  D)
  \[5\sqrt{2+\sqrt{3}}\]
  done clear
  View Answer play_arrow

• question_answer26)
  The element which has a \[{{k}_{\alpha }}\] x-rays line of wavelength \[18\,\,\overset{{}^\circ }{\mathop{A}}\,\] is \[(R={{1.110}^{7}}{{m}^{-1}},\,\,b=1\,\,\text{and}\,\,\sqrt{5/33}=0.39)\]
  A)
  \[Co,\,\,Z=27\]
  done clear
  B)
  \[lron,\,\,Z=26\]
  done clear
  C)
  \[Mn,\,\,Z=25\]
  done clear
  D)
  \[Ni,\,\,Z=28\]
  done clear
  View Answer play_arrow

• question_answer27)

  \[{{M}_{1}}\] and \[{{M}_{2}}\] are plane mirrors and kept parallel to each other. At point O there will be a maxima for wavelength. Light from monochromatic source S of wavelength \[\lambda \] is not reaching directly on the screen. Then \[\lambda \] is:

  \[[D>\,\,>d,\,\,d>\,\,>\lambda ]\]

  A)
  \[\frac{3{{d}^{2}}}{D}\]         
  done clear
  B)
  \[\frac{3{{d}^{2}}}{2D}\]
  done clear
  C)
  \[\frac{{{d}^{2}}}{D}\]          
  done clear
  D)
  \[\frac{2{{d}^{2}}}{D}\]
  done clear
  View Answer play_arrow

• question_answer28)
  A parallel plate capacitor without any dielectric has capacitance \[{{C}_{0}}.\] A dielectric slab is made up of two dielectric slabs of dielectric constants K and 2K and is of same dimensions as that of capacitor plates and both the parts are of equal dimensions arranged serially as shown. If this dielectric slab is introduced (dielectric K enters first) in between the plates at constant speed, then variation of capacitance with time will be best represented by:
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer29)
  An object is moving in a circle at constant speed v. The magnitude of rate of change of momentum of the object
  A)
  is zero
  done clear
  B)
  is proportional to v
  done clear
  C)
  is proportional to \[{{v}^{2}}\] 
  done clear
  D)
  is proportional to \[{{v}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer30)

  Initially the capacitor was uncharged. Current in the capacitor just after switching on will be?

  A)
  \[\frac{\varepsilon }{R}\]
  done clear
  B)
  \[\frac{\varepsilon }{2R}\]
  done clear
  C)
  \[\frac{\varepsilon }{5R}\]
  done clear
  D)
  \[\frac{\varepsilon }{4R}\]
  done clear
  View Answer play_arrow

• question_answer31)

  A uniform rod of length L is charged uniformly with charge q and is rotating about an axis passing through its centre and perpendicular to rod. Magnetic moment of the rod is:

  A)
  \[\frac{q{{L}^{2}}\omega }{6}\]
  done clear
  B)
  \[\frac{q{{L}^{2}}\omega }{12}\]
  done clear
  C)
  \[\frac{q{{L}^{2}}\omega }{24}\]
  done clear
  D)
  \[\frac{q{{L}^{2}}\omega }{36}\]
  done clear
  View Answer play_arrow

• question_answer32)
  Two magnets are dropped along the axis of two metallic tubes of finite length. One is of copper and the other of iron. Then:
  A)
  magnet will come out from both the tubes simultaneously
  done clear
  B)
  magnet will take longer time to travel through iron tube than copper tube
  done clear
  C)
  magnet will take longer time to travel through copper tube than iron tube
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer33)
  A object is moving with velocity \[\nu .\] (w. r. t. earth) parallel to plane mirror \[{{M}_{1}}.\]Another plane mirror \[{{M}_{2}}\] makes an angle \[\beta \] with the vertical as shown in figure. Then velocity of image in mirror \[{{M}_{2}}\] w.r.t. the image in \[{{M}_{1}}\] is -
  A)
   \[2\,\nu \sin \,\,\beta \]               
  done clear
  B)
  \[\nu \cos 2\,\,\beta \]
  done clear
  C)
  \[2\,\nu \sin \,\,\beta \]                
  done clear
  D)
  \[\nu \,\sqrt{2}\]
  done clear
  View Answer play_arrow

• question_answer34)
  The graph between photo electric current and cathode potential when the anode is kept at zero potential, for light of two different intensities out of the same frequency looks like the one:
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer35)
  Two SHM are represented by equations, \[{{y}_{1}}=6\cos \,\,\left( 6\pi t+\frac{\pi }{6} \right),\]\[{{y}_{2}}=3\,(\sqrt{3}\sin 3\pi t+\cos 3\pi t)\]
  A)
  ratio of their amplitudes is 1
  done clear
  B)
  ratio of their time periods is 1
  done clear
  C)
  ratio of their maximum velocities is 1
  done clear
  D)
  ratio of their maximum acceleration is 1.
  done clear
  View Answer play_arrow

• question_answer36)
  There are three concentric thin spheres of radius a, b, c (a > b > c). The total surface charge densities on their surfaces are \[\sigma ,\]\[-\,\sigma ,\]\[\sigma \] respectively. The magnitude: of electric field at r (distance from centre) such that a > r > b is:
  A)
  0                                 
  done clear
  B)
  \[\frac{\sigma }{{{\in }_{0}}{{r}^{2}}}({{b}^{2}}-{{c}^{2}})\]
  done clear
  C)
  \[\frac{\sigma }{{{\in }_{0}}{{r}^{2}}}({{a}^{2}}+{{b}^{2}})\]
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer37)
  The direction of field B at a point P symmetric to P with respect to the vertex i.e., along the axis and the same distance d, but inside the V is along:
  A)
  positive z-axis
  done clear
  B)
  negative x-axis
  done clear
  C)
  negative z-axis
  done clear
  D)
  negative y-axis
  done clear
  View Answer play_arrow

• question_answer38)
  A thin prism of glass is placed in air and water successively. If \[{}_{\alpha }{{\mu }_{g}}=3/2\] and \[{}_{\alpha }{{\mu }_{W}}=4/3,\] then the ratio of deviation produced by the prism for a small angle of incidence when placed in air and water is
  A)
  9 : 8     
  done clear
  B)
  4 : 3
  done clear
  C)
  3 : 4     
  done clear
  D)
  4 : 1
  done clear
  View Answer play_arrow

• question_answer39)
  A wire of fixed length is wound is such a way that it form a solenoid of length \['\ell '\] and radius 'r'. Its self inductance is fund to be L. Now if same wire is wound in such a way that it forms a solenoid of length \[\frac{\ell }{2}\] and radius \[\frac{r}{2},\] then the self inductance will be:
  A)
  2 L
  done clear
  B)
  L
  done clear
  C)
  4 L      
  done clear
  D)
  8 L
  done clear
  View Answer play_arrow

• question_answer40)
  Two identical samples (same material and same amount) P and Q of a radioactive substance having mean life T are observed to have activities \[{{A}_{P}}\] & \[{{A}_{Q}}\] respectively at the time of observation. If P is older than Q, then the difference in their ager is:
  A)
  \[T\,\ell n\,\,\left( \frac{{{A}_{P}}}{{{A}_{Q}}} \right)\]             
  done clear
  B)
  \[T\,\ell n\,\,\left( \frac{{{A}_{Q}}}{{{A}_{P}}} \right)\]
  done clear
  C)
  \[\frac{1}{T}\,\ell n\,\,\left( \frac{{{A}_{P}}}{{{A}_{Q}}} \right)\]          
  done clear
  D)
  \[T\,\,\left( \frac{{{A}_{Q}}}{{{A}_{P}}} \right)\]
  done clear
  View Answer play_arrow

• question_answer41)
  The polymerization of ethylene to linear polyethylene is represented by the reaction: \[nC{{H}_{2}}=C{{H}_{2}}\to {{[-\,C{{H}_{2}}-C{{H}_{2}}-]}_{n}}\] where n has large integral value. Given that the average enthalpies of bond dissociation for C = C and \[C-C\] at 298K are 590 and \[331\,\,kJ\,\,mo{{l}^{-1}}\]respectively, calculate the enthalpy of polymerization per mol of ethylene at 298 K.
  A)
  \[-\,160\text{ }kJ/mol\]               
  done clear
  B)
  \[-\,72\text{ }kJ/mol\]
  done clear
  C)
  \[{{H}_{2}}{{O}_{2}}\]
  done clear
  D)
  \[-\,36\text{ }kJ/mol\]
  done clear
  View Answer play_arrow

• question_answer42)
  Element A bums in nitrogen to give an ionic compound B. Compound B reacts with water to give C and D. A solution of C becomes 'milky' on bubbling carbon dioxide. Identify A, B, C and D.
  A)
  \[S,\text{ }{{S}_{3}}{{N}_{2}},\text{ }S{{O}_{2}}\]
  done clear
  B)
  \[C,\text{ }{{C}_{2}}{{N}_{2}},\text{ }N{{H}_{3}}\]
  done clear
  C)
  \[Fe,\text{ }FeO,\text{ }Fe{{\left( OH \right)}_{2}}\]
  done clear
  D)
  \[Ca,\text{ }C{{a}_{3}}{{N}_{2}},\text{ }Ca{{\left( OH \right)}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer43)
  Compound A of molecular formula \[{{C}_{9}}{{H}_{7}}{{O}_{2}}Cl\] exists in ketoform and predominatly in enolic form B. On oxidation with \[KMn{{O}_{4}},\]   A gives m-chlorobenzoic acid. Identify A and B. 
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer44)
  Complete the following reaction : \[C{{H}_{3}}COOH\xrightarrow{?}ClC{{H}_{2}}COOH\xrightarrow{excess\,\,N{{H}_{3}}}?\]
  A)
  \[{{C}_{2}}{{H}_{5}}OH,\] \[C{{H}_{3}}COON{{H}_{2}}\]
  done clear
  B)
  \[HCl,Cl-C{{H}_{2}}COON{{H}_{2}}\]
  done clear
  C)
  \[O{{H}^{-}},\text{ }C{{H}_{3}}COON{{H}_{2}}\]
  done clear
  D)
  \[P+C{{l}_{2}},\]\[{{H}_{2}}N-C{{H}_{2}}COON{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer45)
  Name the products m the following reaction: \[{{C}_{2}}{{H}_{5}}CHO+C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\xrightarrow[{{C}_{2}}{{H}_{5}}OH\,\,and\,\,heat]{NaO{{C}_{2}}{{H}_{5}}\,\,in\,\,absolute}?\]
  A)
  \[{{C}_{6}}{{H}_{5}}CH=CH-COO{{C}_{2}}{{H}_{5}}\]
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer46)
  In the reaction \[\xrightarrow[(2)\,CHC{{l}_{3}}+KOH]{(1)\,NaOH/B{{r}_{2}}}T;\] the structure of the product T is-
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer47)
  Name the products in the following reaction: \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{O}_{2}}C{{H}_{3}}\xrightarrow[(ii){{H}^{+}}]{(i)C{{H}_{3}}MgBr(excess)}?\]
  A)
  
  done clear
  B)
  
  done clear
  C)
             
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer48)
  In the following reaction; The structure of major product X is-
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer49)
  \[2NOBr\,(g)\,\,\,\,2NO\,(g)+B{{r}_{2}}\,(g).\] If nitrosyl bromide (NOBr) is 40% dissociated at certain temperature and a total equilibrium pressure of 0.30 atm. \[{{K}_{P}}\] for the reaction \[2NOB{{r}_{2}}\,(g)\,\,\,\,2\,NOBr\,(g)\]
  A)
  45        
  done clear
  B)
  25   
  done clear
  C)
  0.022
  done clear
  D)
  0.25
  done clear
  View Answer play_arrow

• question_answer50)
  \[{{H}_{2}}A\] is a weak triprotic acid \[({{K}_{{{a}_{1}}}}={{10}^{-\,5}},{{K}_{{{a}_{2}}}}={{10}^{-\,9}},{{K}_{{{a}_{3}}}}={{10}^{-\,13}})\]; What is the value of \[pX\]of 0.1 M \[{{H}_{3}}A\](aq.) solution ? where \[pX=-\,\log X\] and \[X=\frac{[{{A}^{3-}}]}{[H{{A}^{2-}}]}\]
  A)
  7
  done clear
  B)
  8   
  done clear
  C)
  9
  done clear
  D)
  10
  done clear
  View Answer play_arrow

• question_answer51)
   Product [b] in this reaction is-
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer52)

  Consider the following sequence of reactions.

  The final product [B] is -

  A)
  
  done clear
  B)
  
  done clear
  C)
                    
  done clear
  D)
      
  done clear
  View Answer play_arrow

• question_answer53)
                           A 0.60 g sample consisting of only \[Ca{{C}_{2}}{{O}_{4}}\]and \[Mg{{C}_{2}}{{O}_{4}}\] is heated at \[500{}^\circ C,\]converting the two salts of \[CaC{{O}_{3}}\] and \[MgC{{O}_{3}}.\] The sample then weighs 0.465 g. If the sample had been heated to \[900{}^\circ C,\]where the products are \[CaO\] and \[MgO,\]what would the mixtures of oxides have weighed?
  A)
  0.12 g              
  done clear
  B)
  0.21 g
  done clear
  C)
  0.252 g
  done clear
  D)
  0.3 g
  done clear
  View Answer play_arrow

• question_answer54)

  \[{{H}_{2}}{{O}_{2}}+2KI\xrightarrow{40%yield}{{I}_{2}}+2KOH\]

  \[{{H}_{2}}{{O}_{2}}+2KMn{{O}_{4}}+3{{H}_{2}}S{{O}_{4}}\xrightarrow{50%yield}\]\[{{K}_{2}}S{{O}_{4}}+2MnS{{O}_{4}}+3{{O}_{2}}+4{{H}_{2}}O\]

  150 mL of \[{{H}_{2}}{{O}_{2}}\] sample was divided into two parts. First part was treated with KI and formed KOH required 200 mL of M/2 \[{{H}_{2}}S{{O}_{4}}\] for neutralization. Other part was treated with \[KMn{{O}_{4}}\] yielding 6.74 litre of \[{{O}_{2}}\] at STP. Using % yield indicated find volume strength of \[{{H}_{2}}{{O}_{2}}\]sample used.

  \[{{H}_{2}}{{O}_{2}}+2KI\xrightarrow{40%yield}{{I}_{2}}+2KOH\]

  \[{{H}_{2}}{{O}_{2}}+2KMn{{O}_{4}}+3{{H}_{2}}S{{O}_{4}}\xrightarrow{50%yield}\]\[{{K}_{2}}S{{O}_{4}}+2MnS{{O}_{4}}+3{{O}_{2}}+4{{H}_{2}}O\]

  A)
  5.04                             
  done clear
  B)
  10.08
  done clear
  C)
  3.36     
  done clear
  D)
  33.6
  done clear
  View Answer play_arrow

• question_answer55)
  Choose the correct option for the following molecule in view of chemical bonding:
  A)
  Non-planar                    
  done clear
  B)
  \[\mu \ne 0\]
  done clear
  C)
  [A] and [B] both
  done clear
  D)
  \[\mu =0\]
  done clear
  View Answer play_arrow

• question_answer56)
  Product [b] in above reaction is-
  A)
            
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer57)
  Product (Q) will be-
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer58)
  Structure of \[N{{a}_{2}}[{{B}_{4}}{{O}_{5}}{{(OH)}_{4}}].8{{H}_{2}}O\]contains-
  A)
  Two triangular and two tetrahedral units
  done clear
  B)
  Three triangular and one tetrahedral units
  done clear
  C)
  All tetrahedral units
  done clear
  D)
  All triangular units
  done clear
  View Answer play_arrow

• question_answer59)
  Which of the following pair is incorrectly matched?
  A)
  van Arkel method - Zirconium
  done clear
  B)
  Kroll's process - Titanium.
  done clear
  C)
  Froth Floatation - Cerussite
  done clear
  D)
  Distillation - Zinc
  done clear
  View Answer play_arrow

• question_answer60)
  Decomposition of \[N{{H}_{4}}N{{O}_{2}}(aq)\] into Na(g) and \[2{{H}_{2}}O(\ell )\] is first order reaction. Which of the following graph is correct?
  A)
             
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer61)
  Oxygen is not produced during photosynthesis by:
  A)
  Cycas
  done clear
  B)
  Nostoc
  done clear
  C)
  Green sulphur bacteria
  done clear
  D)
  Chara
  done clear
  View Answer play_arrow

• question_answer62)
  Double fertilization is:
  A)
  Fusion of two male gametes with one egg
  done clear
  B)
  Fusion of one male gamete with two polar nuclei
  done clear
  C)
  Fusion of two male gametes of a pollen tube with two different eggs
  done clear
  D)
  Syngamy and triple fusion
  done clear
  View Answer play_arrow

• question_answer63)
  Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
  A)
  Banana
  done clear
  B)
  Yucca
  done clear
  C)
  Hydrilla
  done clear
  D)
  Viola
  done clear
  View Answer play_arrow

• question_answer64)
  Pollen grains can be stored for several years in liquid nitrogen having a temperature of:
  A)
  \[-\,196{}^\circ \text{C}\]
  done clear
  B)
  \[-\,80{}^\circ \text{C}\]
  done clear
  C)
  \[-\,120{}^\circ \text{C}\]
  done clear
  D)
  \[-\,160{}^\circ \text{C}\]
  done clear
  View Answer play_arrow

• question_answer65)
  Which of the following elements is responsible for maintaining turgor in cells? 
  A)
  Potassium
  done clear
  B)
  Sodium 
  done clear
  C)
  Magnesium
  done clear
  D)
  Calcium
  done clear
  View Answer play_arrow

• question_answer66)
  What is the role of \[\text{NA}{{\text{D}}^{+}}\]in cellular respiration
  A)
  It is a nucleotide source for ATP synthesis.
  done clear
  B)
  It functions as an electron carrier.
  done clear
  C)
  It functions as an enzyme.
  done clear
  D)
  It is the final electron acceptor for anaerobic respiration.
  done clear
  View Answer play_arrow

• question_answer67)
  In which of the following forms is iron absorbed by plants?
  A)
  Free element      
  done clear
  B)
  Ferrous
  done clear
  C)
  Ferric              
  done clear
  D)
         Both ferric and ferrous
  done clear
  View Answer play_arrow

• question_answer68)
  Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
  A)
  \[\lambda \] phage
  done clear
  B)
  \[Ti\] plasmid
  done clear
  C)
  Retrovirus
  done clear
  D)
  \[\text{pBR}\,322\]
  done clear
  View Answer play_arrow

• question_answer69)
  Use of bioresources by multinational companies and  organisations without authorisation from the concerned country and its people is called:
  A)
  Biodegradation
  done clear
  B)
  Biopiracy
  done clear
  C)
  Bio-infringement
  done clear
  D)
  Bioexploitation 
  done clear
  View Answer play_arrow

• question_answer70)
  In  the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is:
  A)
  Research Committee on Genetic Manipulation (RCGM)
  done clear
  B)
  Council for Scientific and Industrial Research (CSIR)
  done clear
  C)
  Indian Council of Medical Research (ICMR)
  done clear
  D)
  Genetic Engineering Appraisal Committee (GEAC)
  done clear
  View Answer play_arrow

• question_answer71)
  The correct order of step in Polymerase Chain Reaction (PCR) is :
  A)
  Denaturation. Extension, Annealing
  done clear
  B)
  Annealing, Extension* Denaturation
  done clear
  C)
  Extension, Denaturation, Annealing
  done clear
  D)
   Deruturation, Annealing, Extension
  done clear
  View Answer play_arrow

• question_answer72)
  Select  the correct match:
  A)
  T.H. Morgan                          -               Transduction
  done clear
  B)
  \[{{\text{F}}_{2}}\times \]Recessive parent      -               Dihybrid cross
  done clear
  C)
  Ribozyme                               -               Nucleic acid
  done clear
  D)
  G. Mendel                              -               Transformation
  done clear
  View Answer play_arrow

• question_answer73)
  A "new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to:
  A)
  Lerma Rojo
  done clear
  B)
  Sharbati Sonora
  done clear
  C)
  Co-667             
  done clear
  D)
  Basmati
  done clear
  View Answer play_arrow

• question_answer74)
  Which of the following pairs is wrongly matched?
  A)
  XO type sex determination  :               Grasshopper
  done clear
  B)
  ABO blood grouping            :               Co-dominance
  done clear
  C)
  Starch synthesis in pea         :               Multiple alleles
  done clear
  D)
  T.H. Morgan                          :               Linkage
  done clear
  View Answer play_arrow

• question_answer75)
  Select the correct statement:
  A)
  Spliceosomes take part in translation
  done clear
  B)
  Punnett square was developed by a British scientist
  done clear
  C)
  Franklin Stahl coined the term "linkage"
  done clear
  D)
  Transduction was discovered by S. Altman
  done clear
  View Answer play_arrow

• question_answer76)
  The experimental proof for semiconservative replication of DNA was first shown in a:
  A)
  Plant
  done clear
  B)
  Bacterium
  done clear
  C)
  Fungus
  done clear
  D)
  Virus
  done clear
  View Answer play_arrow

• question_answer77)
  Which of the following flowers only once in its life- time?
  A)
  Mango
  done clear
  B)
  Jackfruit
  done clear
  C)
  Bamboo species
  done clear
  D)
  Papaya
  done clear
  View Answer play_arrow

• question_answer78)
  Offsets are produced by:
  A)
  Parthenocarpy
  done clear
  B)
  Mitotic divisions
  done clear
  C)
  Meiotic divisions
  done clear
  D)
  Parthenogenesis
  done clear
  View Answer play_arrow

• question_answer79)
  Select the correct-match:
  A)
  Matthew Meselson and F.Stahl                 -           Pisum sativum
  done clear
  B)
  Alfred Hershey and  Martha Chase            -           TMV
  done clear
  C)
  Alee Jeffreys                                           -           Streptococcus pneumonia
  done clear
  D)
  Francois Jacob and Jacques Monod          -           Lac operon
  done clear
  View Answer play_arrow

• question_answer80)
  Which of the following has proved helpful in preserving pollen as fossils?
  A)
  Oil content                    
  done clear
  B)
  Cellulosic inline
  done clear
  C)
  Pollenkitt                      
  done clear
  D)
  Sporopollenin
  done clear
  View Answer play_arrow

• question_answer81)
    Let \[f:\left[ 0,\infty )\to \left[ 0,\infty ) \right. \right.\]and \[g:\left[ 0,\infty )\to \left[ 0,\infty ) \right. \right.\]be non-increasing and non-decreasing functions respectively and \[h(x)\,=g(f(x)).\]if \[f\]and \[g\]are differentiable for all points in their respective domains and \[h(0)=0,\]than
  A)
  \[h(x)\,=0\forall x\ge 0\]
  done clear
  B)
  \[h(x)\,>0\forall x\ne 0\]
  done clear
  C)
  \[h(x)\,<0\forall x\ne 0\]
  done clear
  D)
  none of these  
  done clear
  View Answer play_arrow

• question_answer82)
  The number of such points \[(a+1,\sqrt{3}a),\] where a is any integer, lying inside the region bounded by the circles\[{{x}^{2}}+{{y}^{2}}-2x-3=0\] and \[{{x}^{2}}+{{y}^{2}}-2x-15=0,\]
  A)
  2
  done clear
  B)
  1
  done clear
  C)
  3
  done clear
  D)
  0
  done clear
  View Answer play_arrow

• question_answer83)
  If \[{{x}^{4}}+p{{x}^{3}}+q{{x}^{2}}+rx+5=0,\]has four positive roots, then minimum value of \[pr\]is equal to
  A)
  5
  done clear
  B)
  25
  done clear
  C)
  80
  done clear
  D)
  100
  done clear
  View Answer play_arrow

• question_answer84)
  The area bounded by the curves\[y=f(x),\]the x-axis and the ordinates \[x=1\]and \[x=b\]is \[(b-1)sin\,(3b+4).\]then\[f(x)\] is
  A)
  \[(x-1)\,cos\,(3x+4)\]
  done clear
  B)
  \[\sin \,(3x+4)\]
  done clear
  C)
  \[\sin \,(3x+4)+3(x-1)\,cos\,(3x+4)\]
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer85)
  Let \[n\]be a positive integer such that \[\sin \,\frac{\pi }{2n}+\cos \frac{\pi }{2n}=\frac{\sqrt{n}}{2}.\] Then
  A)
  \[6\le n\le 8\]
  done clear
  B)
  \[4<n\le 8\]
  done clear
  C)
  \[4\le n\le 8\]
  done clear
  D)
  \[4<n<8\]
  done clear
  View Answer play_arrow

• question_answer86)
  The value of \[\underset{x\to 0}{\mathop{\lim }}\,\frac{\int\limits_{0}^{{{x}^{2}}}{{{\sec }^{2}}tdt}}{x\sin x}\,is\]
  A)
  0
  done clear
  B)
  3
  done clear
  C)
  2
  done clear
  D)
  1
  done clear
  View Answer play_arrow

• question_answer87)
  The probability that the length of a randomly chosen chord of a circle lies between \[\frac{2}{3}\]and \[\frac{5}{6}\] of its diameter is
  A)
  \[\frac{5}{16}\]
  done clear
  B)
  \[\frac{1}{16}\]
  done clear
  C)
  \[\frac{1}{4}\]
  done clear
  D)
  \[\frac{5}{12}\]
  done clear
  View Answer play_arrow

• question_answer88)
  Tangents are draw to the circle \[{{x}^{2}}+{{y}^{2}}=50\] from a point \['p'\] lying on the x-axis. These tangents meet the y-axis at point \['{{P}_{1}}'\]and \['{{P}_{2}}'\]possible coordinates of \['P'\]so that area of triangle \[P{{P}_{1}}{{P}_{2}}\] is minimum, are
  A)
  \[\left( 10,0 \right)\]
  done clear
  B)
  \[\left( 10\sqrt{2,0} \right)\]
  done clear
  C)
  \[\left( -10\sqrt{2,0} \right)\]
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer89)
  If \[f:R\to R\] be a differentiable function such that \[f(x+2y)=f(x)+\,f(2y)+4xy\forall \,x,y\in R\] than;
  A)
  \[f'(1)=\,f'(0)+1\]
  done clear
  B)
  \[f'(1)=\,f'(0)-1\]
  done clear
  C)
  \[f'(0)=\,f'(1)+2\]
  done clear
  D)
  \[f'(0)=\,f'(1)-2\]
  done clear
  View Answer play_arrow

• question_answer90)
  If \[\left| z-1 \right|+\left| z+3 \right|\le 8,\]then the range of value of \[\left| z-4 \right|\]is
  A)
  \[(0,7)\]
  done clear
  B)
  \[(1,8)\]
  done clear
  C)
  \[\left[ 1,9 \right]\]
  done clear
  D)
  \[\left[ 2,5 \right]\]
  done clear
  View Answer play_arrow

• question_answer91)
  The focal length of a convex lens of refractive index 1, 5 is 2 cm. The focal length of the lens when immerged in liquid spirit of refractive index 1.25 is
  A)
  5 m
  done clear
  B)
  2.5 cm
  done clear
  C)
  4 cm    
  done clear
  D)
  5 cm
  done clear
  View Answer play_arrow

• question_answer92)

  In the figure shown \[{{v}_{1}},\]\[{{v}_{2}},\]\[{{v}_{3}}\] are AC voltmeters and A is AC ammeter. The readings of \[{{v}_{1}},\]\[{{v}_{2}},\]\[{{v}_{3}}\] and A are 10 V, 20 V, 20 V, 2A respectively. Find the values of R, C, L and the source voltage \[{{v}_{s}}.\] If the inductor is short circuit then what will be the readings of \[{{v}_{1}},\]\[{{v}_{2}}.\] and A.

  A)
  \[2\sqrt{5}\,\,\text{volts}\]
  done clear
  B)
  \[4\sqrt{5}\,\,\text{volts}\]
  done clear
  C)
  \[6\sqrt{5}\,\,\text{volts}\]
  done clear
  D)
  \[8\sqrt{5}\,\,\text{volts}\]
  done clear
  View Answer play_arrow

• question_answer93)

  A segment of angle \[\theta \] is cut from a half disc with symmetry of symmetrically as shown. If the centre of mass of the remaining. part is at a distance 'a' from O and the centre of mass of the original disc was at distance d then it can be definitely said that

  A)
  \[a=d\]
  done clear
  B)
  a > d
  done clear
  C)
  a < d
  done clear
  D)
  A, B, C depends on the angle of segment cut from disc.
  done clear
  View Answer play_arrow

• question_answer94)

  A large open tank has two small holes in its vertical wall as shown in figure. One is a square hole of side 'L' at a depth '4y' from the top and the other is a circular hole of radius 'R' at a depth y from the top. When the tank is completely filled with water, the quantities of water flowing out per second from both holes are the same.

  The, 'R' is equal to:

  A)
  \[\frac{L}{\sqrt{2\pi }}\]
  done clear
  B)
  \[2\pi \,L\]
  done clear
  C)
  \[\sqrt{\frac{2}{\pi }}\,\,.\,\,L\]
  done clear
  D)
  \[\frac{L}{2\pi }\]
  done clear
  View Answer play_arrow

• question_answer95)

  If a charged particle of charge to mass ratio \[\frac{q}{m}=\alpha \] is entering in a magnetic field of strength B at a speed \[v=(2\,\alpha \,d)\,\,(B),\] then which of the following is correct:

  A)
  angle subtended by charged particle at the centre of circular path is \[2\pi .\]
  done clear
  B)
  the charge will move on a circular path and will come out from magnetic field at a distance 4d from the point of insertion.
  done clear
  C)
  the time for which particle will be in the magnetic field is \[\frac{2\pi }{\alpha B}.\]
  done clear
  D)
  the charged particle will subtend an angle of  \[90{}^\circ \] at the centre of circular path
  done clear
  View Answer play_arrow

• question_answer96)

  Two identical rectangular rods of metal are welded end to end in series between temperature \[0{}^\circ C\] and \[100{}^\circ C\] and 10 J of heat is conducted (in steady state process) through the rod in 2.00 min. If 5 such rods are taken and joined as shown in figure maintaining the same temperature difference between A and B, then the. time in which 20 J heat will flow through the rods is:

  A)
  30 sec.
  done clear
  B)
  2 min.
  done clear
  C)
  1 min.
  done clear
  D)
  20 sec.
  done clear
  View Answer play_arrow

• question_answer97)

  Two points A & B on a disc have velocities \[{{v}_{1}}\] & \[{{v}_{2}}\] at some moment. Their directions make angles \[60{}^\circ \] and \[30{}^\circ \] respectively with the line of separation as shown in figure. The angular velocity of disc is:

  A)
  \[\frac{\sqrt{3}{{v}_{1}}}{d}\]             
  done clear
  B)
  \[\frac{{{v}_{2}}}{\sqrt{3}\,d}\]
  done clear
  C)
  \[\frac{{{v}_{2}}-{{v}_{1}}}{d}\]
  done clear
  D)
  \[\frac{{{v}_{2}}}{d}\]
  done clear
  View Answer play_arrow

• question_answer98)

  A chain of length L is placed on a horizontal surface as shown in figure. At any instant x is the length of chain on rough surface and the remaining portion lies on smooth surface. Initially \[x=0.\] A horizontal force P is applied to tin: chain (as shown in figure). In the duration x changes from \[x=0\] to \[x=L,\] for chain to move with constant speed.

  A)
  the magnitude of P should increase with time
  done clear
  B)
  the magnitude of P should decrease with time
  done clear
  C)
  the magnitude of P should increase first and then decrease with time
  done clear
  D)
  the magnitude of P should decrease first and then increase with time
  done clear
  View Answer play_arrow

• question_answer99)
  An object approaches a fixed diverging lens with a constant velocity from infinity along the principal axis. The relative velocity between object and its image will be:
  A)
  increasing
  done clear
  B)
  decreasing
  done clear
  C)
  first increases then decreases
  done clear
  D)
  first decreases and then increases.
  done clear
  View Answer play_arrow

• question_answer100)

  A ring of radius R is placed in the plane with its centre at origin and its axis along the x-axis and having uniformly distributed positive charge. A ring of radius \[r\left( <<R \right)\] and coaxial with the larger ring is moving along the axis with constant velocity then the variation of electrical flux \[\left( \phi  \right)\] passing through the smaller ring with position will be best represented by :

  A)
                                    
  done clear
  B)
                     
  done clear
  C)
  
  done clear
  D)
                    
  done clear
  View Answer play_arrow

• question_answer101)
  Which of the following statement is correct?
  A)
  \[S-S\] bond is present in \[{{H}_{2}}{{S}_{2}}{{O}_{6}}.\]
  done clear
  B)
  In peroxosulphuric add \[({{H}_{2}}S{{O}_{5}})\] sulphur is in + 8 oxidation state.
  done clear
  C)
  Copper powder along with \[A{{l}_{2}}{{O}_{3}}\] and \[{{K}_{2}}O\] is used as a catalyst in the preparation of \[N{{H}_{3}}\] by Haber's process.
  done clear
  D)
  Change in enthalpy is positive for the preparation of \[S{{O}_{3}}\] by catalytic oxidation of \[S{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer102)
  Electrode potential for \[Zn\] electrode varies according to the equation. \[{{E}_{Z{{n}^{2+}}|Zn}}=E{{{}^\circ }_{Z{{n}^{2+}}|Zn}}-\frac{0.059}{2}\log \frac{1}{[Z{{n}^{2+}}]}.\] The graph of \[{{E}_{Z{{n}^{2+}}|Zn}}\] vs log \[[Z{{n}^{2+}}]\] is-
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer103)
  Graph between log K and \[\frac{1}{T}\] [Where K is rate constant \[({{S}^{-1}})\] and T is temperature (K)] is a straight line with OX = 5, \[\theta ={{\tan }^{-1}}\left[ -\frac{1}{2.303} \right].\] Hence \[Ea\]and log A respectively will be:
  A)
  \[2.303\times 2\,cal,5\]
  done clear
  B)
  \[\frac{2}{3.303}cal,{{e}^{5}}\]
  done clear
  C)
  2 cal, 5
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer104)
  For a binary ideal liquid solution, the variation in total vapour pressure versus composition of solution is given by which of the curves?
  A)
       
  done clear
  B)
  
  done clear
  C)
       
  done clear
  D)
  [B] & [C]
  done clear
  View Answer play_arrow

• question_answer105)

  (I) \[[Mn{{(C{{l}_{6}}]}^{3\,-}},\] \[{{[Fe{{F}_{5}}]}^{3\,-}}\] and \[{{[Co{{F}_{5}}]}^{3\,-}}\] are paramagnetic having four, five and four unpaired electrons respectively.

  (II) Valence bond theory gives a quantitative interpretation of the thermodynamics    stabilities of coordination compounds.

  (III) The crystal field splitting \[{{\Delta }_{0}},\] depends upon the field produced by the ligand and charge on the metal ion.

  Amongs the following correct statements are -

  A)
  I, II
  done clear
  B)
  I, III
  done clear
  C)
  I, II, III
  done clear
  D)
  II, III
  done clear
  View Answer play_arrow

• question_answer106)
  1 mol \[C{{H}_{3}}COOH\] is added in 250 g benzene Acetic acid dimerises in benzene due to hydrogen bond. \[{{K}_{b}}\] of benzene is 2K \[kg\,mo{{l}^{-\,1}}\]. The boiling point has increased by 6.4 K. % dimerisation of acetic acid is -
  A)
  50
  done clear
  B)
  40
  done clear
  C)
  30
  done clear
  D)
  20
  done clear
  View Answer play_arrow

• question_answer107)

  \[{{S}_{1}}\]: Trans-But-2-ene has higher boiling point than ct's-But-2-ene.

  \[{{S}_{2}}\]: 1, 4-dichlorobenzene has zero dipole moment.

  \[{{S}_{3}}\]: Trans cyclodecene is more stable as compare to cis-cylodecene.

  \[{{S}_{4}}\]: Trans 1, 2-Dibromoethene is more soluble I water than cis-1, 2-Dibromoethene.

  A)
  T T T T
  done clear
  B)
  F T F T
  done clear
  C)
  F F F F
  done clear
  D)
  F T F F
  done clear
  View Answer play_arrow

• question_answer108)

  Compound \[X({{C}_{3}}{{H}_{6}}O)\] gives negative tests with the following reagents.

  [a] \[B{{r}_{2}}\]

  [b] 2, 4-Dinitrophenylhydrazine

  [c] Na metal.

  It gives two monochloro structural isomers. Identify 'X'.

  A)
  \[C{{H}_{2}}=CH-O-C{{H}_{3}}\]
  done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-CHO\]
  done clear
  C)
      
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer109)
  Two hexoses form the same osazone find the correct statement about these hexoses.
  A)
  Both of them must be aldoses
  done clear
  B)
  They are epimers at C-3
  done clear
  C)
  The carbon atoms 1 and 2 in both have the same configuration
  done clear
  D)
  The carbon atoms 3, 4 and 5 in both have the same configuration
  done clear
  View Answer play_arrow

• question_answer110)
  Phenol is not obtained by
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer111)
  Natality refers to:
  A)
  Number of individuals leaving the habitat
  done clear
  B)
  Birth rate
  done clear
  C)
  Death rate
  done clear
  D)
  Number of individuals entering a habitat
  done clear
  View Answer play_arrow

• question_answer112)
  World Ozone Day is celebrated on:
  A)
  16th September
  done clear
  B)
  21st April
  done clear
  C)
  5th June
  done clear
  D)
  22nd April
  done clear
  View Answer play_arrow

• question_answer113)
  Which of the following is a secondary pollutant?
  A)
  \[\text{S}{{\text{O}}_{\text{2}}}\]       
  done clear
  B)
  \[\text{C}{{\text{O}}_{\text{2}}}\]
  done clear
  C)
  CO
  done clear
  D)
  \[{{\text{O}}_{\text{3}}}\]
  done clear
  View Answer play_arrow

• question_answer114)
  Niche is:
  A)
  the range of temperature that the organism needs to live
  done clear
  B)
  the physical space where an organism lives
  done clear
  C)
  all the biological factors in the organism's environment
  done clear
  D)
  the functional role played by the organism where it lives
  done clear
  View Answer play_arrow

• question_answer115)

  What type of ecological pyramid would be obtained with the following data?

  Secondary consumer : 120 g

  Primary consumer : 60 g

  Primary producer : 10 g

  A)
  Upright pyramid of numbers
  done clear
  B)
  Pyramid of energy
  done clear
  C)
  Inverted pyramid of biomass
  done clear
  D)
  Upright pyramid of biomass
  done clear
  View Answer play_arrow

• question_answer116)
  In stratosphere, which of the following elements acts as a catalyst in degradation of ozone» and release of molecular oxygen?
  A)
  \[Fe\]
  done clear
  B)
  \[Cl\]
  done clear
  C)
  Carbon
  done clear
  D)
  Oxygen
  done clear
  View Answer play_arrow

• question_answer117)
  The two functional groups characteristic of sugars are:
  A)
  Carbonyl and phosphate
  done clear
  B)
  Carbonyl and methyl
  done clear
  C)
  Hydroxyl and methyl
  done clear
  D)
  Carbonyl and hydroxyl
  done clear
  View Answer play_arrow

• question_answer118)
  Which among' the' following is not a prokaryote?
  A)
  Nostoc
  done clear
  B)
  Mycobacterium
  done clear
  C)
  Saccharomyces   
  done clear
  D)
  Oscillatoria
  done clear
  View Answer play_arrow

• question_answer119)
  The Golgi complex participates in:
  A)
  Respiration in bacteria
  done clear
  B)
  Formation of secretory vesicles
  done clear
  C)
  Fatty acid breakdown
  done clear
  D)
  Activation of anwno acid
  done clear
  View Answer play_arrow

• question_answer120)
  Which of the following is not a product of light reaction of photosynthesis?
  A)
  NADPH
  done clear
  B)
  NADH
  done clear
  C)
  ATP
  done clear
  D)
  Oxygen
  done clear
  View Answer play_arrow