Solved papers for BCECE Medical BCECE Medical Solved Papers-2015
done BCECE Medical Solved Papers-2015 Total Questions - 150
question_answer1) A ball is thrown from the ground to clear a wall 3 m high at a distance of 6 m and falls 18 m away from the wall, the angle of projection of ball is
question_answer2) Consider if the electric flux entering and leaving an enclosed surface respectively are \[{{\phi }_{1}}\] and \[{{\phi }_{2}}\], the electric charge inside the surface will be
question_answer3) If the escape speed of a projectile on Earths surface is 11.2 \[km{{s}^{-1}}\] and a body is projected out with thrice this speed, then determine the speed of the body far away from the Earth.
question_answer4) Determine the potential drop between the points A and C in the following circuit. Resistances \[1\,\,\Omega \] and \[2\,\,\Omega \] are representing the internal resistances of the respective cells.
question_answer5) A tank is filled with a liquid upto a height H. A small hole is made at the bottom of this tank. Consider \[{{t}_{1}}\] be the time taken to empty first half of the tank and \[{{t}_{2}}\] be the time taken to empty rest half of the tank. Then, determine the ratio \[\frac{{{t}_{1}}}{{{t}_{2}}}\].
question_answer6) An electron and a proton enter a magnetic field perpendicularly both have same kinetic energy. Which of the following statements are true?
question_answer7) The coefficient of volume expansion of glycerine is \[49\times {{10}^{-5}}{{K}^{-1}}\]. What is the fractional change in its density for a \[{{30}^{o}}C\] rise in temperature?
question_answer8) If a conducting rod of length 4 \[l\] is rotated about at point O in a uniform magnetzic field B directed into the paper and \[DE=l,\,EA=3l\], then
question_answer9) An open organ pipe has a fundamental frequency of 300 Hz. The first overtone of a closed organ pipe has the same frequency as the first overtone of organ pipe. How long is each pipe?
question_answer10) In L-C-R circuit, \[f=\frac{50}{\pi }\,Hz\], V = 50 V, R = 300 \[\Omega \] If L = 1 H and C = 20 \[\mu C\], then the voltage across capacitor is
question_answer11) In a car race, car A takes a time t less than car B at the finish and passes the finishing point with speed v more than that of the car B. Assuming that both the cars starts from rest and travel with constant accelerations \[{{a}_{1}}\] and \[{{a}_{2}}\] respectively. So, the value of v will be
question_answer12) If an equiconvex lens is cut into two halves along (i) XOX and (ii) YOY as shown in the figure. Let \[f,f,f\] be the focal lengths of complete lens of each, in case (i) and of each half in case (ii) respectively. Choose the correct statement from the following?
question_answer13) The bob of a pendulum is released from < horizontal position A as shown in the figure If the length of the pendulum is 1.5 m, what is the speed with which the bob arrives at the lower most point B, given that it dissipated 5% of its initial energy against air resistance?
question_answer14) In a photoemissive cell with executing wavelength \[\lambda \], the fastest electron has speed v. If the exciting wavelength is changed to \[\frac{3\lambda }{4}\]the speed of fastest emitted electron will be
question_answer15) A ball of mass m moving at a speed v makes a head on collision with an identical ball at rest. The kinetic energy at the balls after the collision is 3/4th of the original. What is the coefficient of restitution?
question_answer16) A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr respectively. The time in years after which one-fourth of material remains, is
question_answer17) A cylinder rolls up an inclined plane at an angle of \[{{30}^{o}}\]. At the bottom of the inclined plane, the centre of mass of the cylinder has speed of 5 m/s. How long will it take to return to the bottom?
question_answer18) The current gain in the common emitter amplifier mode of a transistor is 10. The input impedance is 20 \[k\Omega \] and load of resistance is 100 \[k\Omega \]. The power gain is
question_answer19) What will be the displacement equation of the simple harmonic motion obtained by combining the motions? \[{{x}_{1}}=2\,\sin \omega \,t\], \[{{x}_{2}}=4\,\sin \left( \omega \,t+\frac{\pi }{6} \right)\] and\[{{x}_{3}}=6\,\sin \left( \omega \,t+\frac{\pi }{3} \right)\]
question_answer20) An ammeter A reads 2 A and the voltmeter V reads 20 V. The value of resistance R is (assuming finite resistaneces of ammeter and voltmeter)
question_answer21) A stream of water flowing horizontally with the speed of 15 \[m{{s}^{-1}}\] gushes out of a tube of cross-sectional area \[{{10}^{-2}}{{m}^{-2}}\] and hits a vertical wall nearby. What is the force exerted on the wall by the impact or water? Assuming it does not rebound.
question_answer22) Two charges \[+6\,\,\mu C\] and \[-4\,\,\mu C\] are placed 15 cm apart as shown. At what distances from A to its right, the electrostatic potential is zero?
question_answer23) A shell of mass 0.020 kg is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 80 \[m{{s}^{-1}}\]. What is the recoil speed of the gun?
question_answer24) If \[E=100\sin (100\,t)\] volt and \[I=100\sin \left( 100\,t+\frac{\pi }{3} \right)mA\] are the instantaneous voltage and current, then the rms values of voltage and current are respectively;
question_answer25) If torques of equal magnitudes are applied to a hollow cylinder and a solid sphere both having the same mass and radius. The cylinder is free to rotate about its standard axis of symmetry and the sphere is free to rotate about an axis passing through its centre. Which of the two will acquire a greater angular speed after a given time?
question_answer26) . The threshold frequency for certain metal is\[3.3\times {{10}^{14}}Hz\]. If light of \[8.2\times {{10}^{14}}Hz\] frequency is incident on the metal, then the cut-off voltage of the photoelectric current will be
question_answer27) If two simple pendulums first of bob mass \[{{M}_{1}}\]and length \[{{l}_{1}}\] second of bob mass \[{{M}_{2}}\] and length \[{{l}_{2}}\]. Given \[{{M}_{1}}={{M}_{2}}\] and \[{{l}_{1}}=2{{l}_{2}}\]. If the vibrational energies of both are same, then which of the following is correct?
question_answer28) A thin film of soap solution \[({{\mu }_{s}}=1.4)\] lies on the top of a glass plate \[({{\mu }_{g}}=1.5)\]. When visible light is incident almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 420 nm and 630 nm. The minimum thickness of the soap solution are
question_answer29) An air bubble stats rising from the bottom of a lake. Its diameter is 3.6 mm at the bottom and 4 mm at the surface. The depth of the lake is 250 cm and the temperature at surface is\[{{40}^{o}}C\]. What is the temperature at the bottom of the lake? Given atmpospheric pressure = 76 cm of Hg and \[g=980\,\,cm/{{s}^{2}}\].
question_answer31) A simple harmonic wave of amplitude 8 unit travels along positive x-axis. At any given instant of time, for a particle at a distance of 10 cm from the origin, the displacement is + 6 unit and for a particle at a distance of 25 cm from the origin, the displacement is + 4 unit. Calculate the wavelength,
question_answer32) When a battery of emf 8 V with internal resistance \[0.5\,\,\Omega \] is charged by a 120 V DC supply using a series resistance of \[15.5\,\,\Omega \], then the terminal voltage of the battery is
question_answer33) A rigid bar of mass 15 kg is supported symmetrically by three wires each 2 m long. Those at each end are of copper and the middle one is of iron. Determine the ratio of their diameters if each is to have the tension.
question_answer34) Figure given below shows a network of four capacitors of capacitance equal to \[{{C}_{1}}=C\], \[{{C}_{2}}=2C,\,\,{{C}_{3}}=3C,\,\,{{C}_{4}}=4C\] are connected to a battery. The ratio of charges on \[{{C}_{2}}\] and \[{{C}_{4}}\] is
question_answer35) Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 \[km{{h}^{-1}}\]m the same direction, with A head of speed B. The driver of B decides to overtake A and accelerates by \[1\,m/{{s}^{-2}}\]. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?
question_answer36) If a fully charged capacitor C with initial charge \[{{q}_{0}}\] is connected to a coil of self inductance L at\[t=0\]. The time at which the energy is stored equally between the electric field and magnetic field is
question_answer37) A rocket is fired from the Earth towards the Sun. At what distance from the Earths centre, the gravitational force on the rocket is zero? Mass of the Sun \[=2\times {{10}^{30}}kg\] and mass of the Earth \[=6\times {{10}^{24}}kg\].
question_answer38) In the figure given below, for an angle of incidence \[{{45}^{o}}\] at the top surface, what is the minimum refractive index need- to total internal reflection at vertical face?
question_answer39) A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad \[{{s}^{-1}}\]. The radius of the cylinder is 0.25 m. What is the kinetic energy associated with the rotation of cylinder? What is the magnitude of angular momentum of cylinder about its axis?
question_answer41) A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with speed 40 rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200 N?
question_answer42) A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid air by a uniform horizontal magnetic field B. The magnitude of B (in tesla) is
question_answer43) A U -shaped wire is dipped in a soap solution and removed. The thin soap film formed between the wire and light slider supports a weight of \[1.5\times {{10}^{2}}N\]. The length of the slider is 30 cm. What is the surface tension of the film?
question_answer44) At constant pressure, the ratio of increase in volume of an ideal gas per degree rise in kelvin temperature to its original volume is
question_answer45) The length of a magnet is large compared to its width and breadth. The time period of its oscillation in vibration magnetometer is 2 s. The magnet is cut along its length into three equal parts and three parts are then palced on each other with their like poles together. The lime period of this combination will be
question_answer46) A body of mass 1 kg is moving in a vertical. circular path of radius 1 m. The difference between the kinetic energies at its highest and lowest positions is
question_answer47) If electrical force between two charges is 200 N and we increase 10% charge on one of the charges and decrease 10% charge on the other, then electrical force between them for the same distance becomes
question_answer48) The acceleration due to gravity on the planet is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same on the planet B7
question_answer49) In hydrogen atom spectrum, frequency of \[2.7\times {{10}^{15}}Hz\] of EM wave is emitted when transmission takes place from 2 to 1. If it- moves from 3 to 1, the frequency emitted will be
question_answer50) If a ray of light in a denser medium strikes a rarer medium at an angle of incidence 2, the angles of reflection and refraction are respectively r and r. If the reflected and refracted rays are at right angles to each other, the critical angle for the given pair of media is
question_answer51) Consider the following reaction sequence of alkene \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{{{O}_{3}}}A\xrightarrow[Zn]{{{H}_{2}}O}B\] The product B is
question_answer53) The energy required to excite the electron in the atom from \[n=1\] to \[n=2\], when the ionization enthalpy of hydrogen atom is \[1.312\times {{10}^{6}}J/mol\] will be (in the unit of \[{{10}^{5}}\]).
question_answer61) If the dipole moment of HBr is \[2.60\times {{10}^{-30}}Cm\]and the interatomic spacing is 1.41 \[\overset{o}{\mathop{A}}\,\], then the per cent ionic character of HBr is
question_answer65) Beryllium gives a compound X with the following percentage composition: Be-6.1%, N-37.8%, Cl-48%, H-8.1%. Molecular weight of X is \[148\,\,g\,mo{{l}^{-1}}\] and that of Be is \[9\,\,g\,mo{{l}^{-1}}\]. The molecular formula of the compound is
question_answer67) Compound A undergoes following reactions to form B and C Black coloured solid [A] \[\xrightarrow{KN{{O}_{3}}+KOH}\] Green coloured solution [B] Green coloured \[\xrightarrow{C{{O}_{2}}}\] Pink solution[C] + [A] Solution [B] [C] decolourised by \[F{{e}^{3+}}\] Identify A, B and C respectively
A)
\[Mn{{O}_{2}},\,KMn{{O}_{4}}\] and \[{{K}_{2}}Mn{{O}_{4}}\]
doneclear
B)
\[Mn{{O}_{2}},\,{{K}_{2}}Mn{{O}_{4}}\] and \[KMn{{O}_{4}}\]
doneclear
C)
\[KMn{{O}_{4}},\,Mn{{O}_{2}}\] and \[{{K}_{2}}Mn{{O}_{4}}\]
doneclear
D)
\[KMn{{O}_{4}},\,{{K}_{2}}Mn{{O}_{4}}\] and \[Mn{{O}_{2}}\]
question_answer68) The reaction between nitric oxide (NO) and oxygen to form nitrogen dioxide \[(N{{O}_{2}})\] is a key step in photochemical smog formation \[2NO(g)+{{O}_{2}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)\] The grams of \[N{{O}_{2}}\] are formed by complete by reaction of 1.20 g of NO is
question_answer69) \[2HC\equiv CH\,\,\xrightarrow[+N{{H}_{4}}Cl]{C{{H}_{2}}C{{l}_{2}}}\,A\,\,\xrightarrow[HCl]{1\,\,mol}\,\,B\] Identify the compounds A and B.
question_answer70) At \[{{80}^{o}}C\], the vapour pressure of pure liquid A is 520 mm Hg and that of pure liquid B is 1000 mm Hg. If a mixture solution of A and B boils at \[{{80}^{o}}C\]and 1 atm pressure, the amount of A in the mixture is
question_answer72) Consider the following reaction, \[ZnC{{l}_{2}}+NaOH\xrightarrow{{}}\underset{White\text{ }ppt.}{\mathop{B}}\,\xrightarrow{NaOH}\underset{Soluble}{\mathop{C}}\,\] Then, the final product C is
question_answer73) The vapour pressure of pure water is 23.5 mm Hg. Then, the vapour pressure of an aqueous solution which contains 5 mass percent of urea is (Molar mass of urea is 60).
question_answer75) Consider the following reactions, \[C\,(s)+{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g),\,\Delta H=-94\,kcal\] \[2CO\,(g)+{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}}(g),\,\Delta H=-135.2\,kcal\] Then, the heat of formation of CO (g) is
question_answer76) If the \[p{{K}_{a}}\] of a weak acid HA is 4.80 and the\[p{{K}_{b}}\] , of a weak base BOH is 4.78. Then, the pH of an aqueous solution of the corresponding salt, BA will be
question_answer78) A nitrogenous substance A is treated with\[HN{{O}_{2}}\] and the product formed is further treated with \[NaOH\] solution which produces blue colouration. Then, A will be
question_answer79) Argon crystallises in fee arrangement and the density of solid and liquid Ar is \[1.59\,\,g/c{{m}^{3}}\] and \[1.42\,\,g/c{{m}^{3}}\], respectively. The percentage of empty space in liquid Ar is
question_answer81) When 4A of current is passed through a 1.0 L, 0.10 M \[F{{e}^{3+}}(aq)\] solution for 1 h, it is partly reduced to Fe(s) and partly of \[F{{e}^{2+}}(aq)\]. Identify the incorrect statement.
A)
0.10 mole of electrons are required to convert all \[F{{e}^{3+}}\] to \[F{{e}^{2+}}\]
question_answer84) Given that, \[E_{F{{e}^{2+}}/Fe}^{o}=-0.44\,\,V\], \[E_{F{{e}^{2+}}/F{{e}^{3+}}}^{o}=-0.77\,\,V\]. If \[F{{e}^{2+}},F{{e}^{3+}}\] and Fe solid are kept together, then
question_answer86) In terms of Arrhenius equation, \[k=A{{e}^{-{{E}_{a}}RT}}\]the temperature dependence of rate constant (k) of a chemical reaction is written. Then, the activation energy \[({{E}_{a}})\] of the reaction can be calculated by plotting.
question_answer88) \[PhC{{H}_{2}}C{{H}_{3}}\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,Cr{{O}_{2}}C{{l}_{2}}/CC{{l}_{4}}}PhC{{H}_{2}}CHO\] The above reaction is an example of which, name reaction?
question_answer96) When 0.1 M NaOH is titrated with 0.1 M, 20 mL HA till the end point, \[{{K}_{a}}(HA)=6\times {{10}^{-6}}\] and degree of dissociation of HA is small as compared to unity. What is the pH of the resulting solution at the end point?
question_answer98) What is the enthalpy of the disproportionation of \[MgCl\] if the enthalpy of formation of hypothetical \[MgCl\] is \[-125\,kJ/mol\] and the \[MgC{{l}_{2}}\] is \[-642\,kJ/mol\]?
question_answer100) Given the following bond dissociation enthalpies \[(kJ\,\,mo{{l}^{-1}})\]. \[P\equiv P-490,\,P-P=209,\,N\equiv N-946,N-N-160\]Compare the enthalpy changes for the process (i) \[2{{P}_{2}}(g)\xrightarrow{{}}{{P}_{4}}(g)\] (ii) \[2{{N}_{2}}(g)\xrightarrow{{}}{{N}_{4}}(g)\] Choose the correct option.
A)
\[{{P}_{4}}\] is feasible but \[{{N}_{4}}\]is hot feasible
doneclear
B)
\[{{P}_{4}}\] is not feasible but \[{{N}_{4}}\] is feasible
doneclear
C)
Both \[{{P}_{4}}\] and \[{{N}_{4}}\] are feasible
doneclear
D)
Both \[{{P}_{4}}\] and \[{{N}_{4}}\]are not feasible
question_answer102) Chlamydomonas and Chlorella, earlier placed in algae within plants (both having cell wall) are now placed together in which new kingdom. Choose the correct option.
question_answer115) Radioactive \[C{{O}_{2}}{{(}^{14}}C{{O}_{2}})\] is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with \[^{14}C{{O}_{2}}\]?
question_answer124) A person met with an accident and was diagonsed with memory loss. Choose the correct option for the part of brain injured in the accident.
question_answer130) Pasteurs experiment to refute the theory of spontaneous generation was successful spontaneous generation did not occur in his set up because
A)
he did not boil the flask for long
doneclear
B)
the S-shaped flask used by Pasteur prevented the contamination of broth by air
doneclear
C)
extreme precautions were used by him to kept his flask covered
doneclear
D)
he used fine muslin cloths to cover his experimental set up
question_answer137) An individual contracted an allergic substance and started wheezing and sneezing. In response the bodys cell secrete some chemicals against allergens, which among those given below are?
question_answer138) Malignant cancer cells can cross the cellular barriers and spread themselves, causing cancer in any part of the body, this property of cancer cells is
question_answer142) After an organ transplant operation, a doctor prescribed an immuno suppressant drug to the patient. Which of the following would thus be included in for this purpose?
question_answer150) The thinning of egg shell and their premature breaking is causing a decline in bird population in certain areas. The probable reason for this could be