AMUEEE 2018 Physics Question Paper with Answer Key PDFs (April 29)

AMUEEE Questions

• 1.

  A rocket is moving at a speed of $ 200 \,m/s $ towards a stationary target. While moving it emits a wave of frequency $ 1000 \,Hz $ . Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $ = 330 \,m/s $ )

  • $ 1000\, Hz $
  • $ 1580\, Hz $
  • $ 2540\, Hz $
  • $ 4080\, Hz $
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• 2.

  The electrode potential, $ E^{\circ} $ , for the reduction of $ MnO^{-}_{4} $ to $ Mn^{2+} $ in acidic medium is $ +1.51\, V $ . Which of the following metal(s) will be oxidised? The reduction reactions and standard electrode potentials for $ Zn^{2+}, Ag^{+} $ , and $ Au^{+} $ are given as $ Zn^{2+} (aq) +2e \to Zn(s), E^{\circ} = -0.762\, V $ $ Ag+ (aq) +e {\rightleftharpoons} Ag (s), E^{\circ}=+0.80 \,V $ $ Au^{+} (aq) +e {\rightleftharpoons} Au(s), E^{\circ}+1.69\,V $

  • $ Zn $ and $ Au $
  • $ Ag $ and $ Au $
  • $ Au $
  • $ Zn $ and $ Ag $
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• 3.

  The air pressure at sea level is $ 101325 \,Pa $ . At the centre of a rarefaction of a sound wave in air, the pressure is $ 91000 \,Pa $ . Which is the most likely pressure at the centres of a compression of the same wave?

  • $ 91000\, Pa $
  • $ 101000\, Pa $
  • $ 111650\, Pa $
  • $ 121000\, Pa $
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• 4.

  The standard emf of the cell $ (E^{\circ}_{cell} $ and equilibrium constant $ (K_{eq}) $ of the following reaction of $ 298\, K $ $ Cd^{2+} + 4NH_{3} {\rightleftharpoons} Cd (NH_{3})^{2+}_{4} $

  • $ E^{\circ}_{cell}=1.0V, K_{eq}=126\times10^{7} $
  • $ E^{\circ}_{cell}=0.21 V, K_{eq}=126\times10^{7} $
  • $ E^{\circ}_{cell}=1.0 V, K_{eq}=6.60\times10^{33} $
  • $ E^{\circ}_{cell}=0.21 V, K_{eq}=6.60\times10^{33} $
  View Solution

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• 5.

  If $ \chi_{1} $ and $ \chi_{2} $ represent the mole fractions of a component $ A $ in the vapour phase and liquid mixture respectively, and $ p^{\circ}_{A} $ and $ p^{\circ}_{B} $ represent vapour pres sines of pure A and pure B, then total vapour pressure of liquid mixture is

  • $ \frac{\rho^{\circ}_{A}\chi_{1}}{\chi_{2}} $
  • $ \frac{\rho^{\circ}_{A}\chi_{2}}{\chi_{1}} $
  • $ \frac{\rho^{\circ}_{B}\chi_{1}}{\chi_{2}} $
  • $ \frac{\rho^{\circ}_{B}\chi_{2}}{\chi_{1}} $
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• 6.

  The $ EAN $ value $ y \left[Ti\left(\sigma-C_{6}H_{5}\right)_{2}\left(\pi-C_{5}H_{5}\right)_{2}\right]^{0} $ is

  • $ 32 $
  • $ 33 $
  • $ 34 $
  • $ 35 $
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