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

AMUEEE Questions

• 1.

  The ratio of the half-life time $ (t_{1/2}) $ , to the three quarter life-time, $ (t_{3/4}) $ , for a reaction that is second order

  • depends directly on concentration of reactants
  • is independent of concentration of reactant
  • depends inversely on the concentration of reactants
  • depends directly to the square of concentration of reactants
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• 2.

  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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• 3.

  Figure shows three arrangements of electric field lines. In each arrangement, a proton is released from rest at point $ A $ and then accelerated through point $ B $ by the electric field. Points $ A $ and $ B $ have equal separations in the three arrangements. If $ p_{1}, p_{2} $ and $ p_{3} $ are linear momentum of the proton at point $ B $ in the three arrangement respectively, then

  

  • $ p_{1} > \, p_{3} > \, p_{2} $
  • $ p_{1} > \, p_{2} > \, p_{3} $
  • $ p_{2} > \, p_{1} > \, p_{3} $
  • $ p_{3} > \, p_{2} > \, p_{1} $
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• 4.

  The only force acting on a $ 2 \,kg $ body that is moving in $ xy- $ plane has a magnitude of $ 5\, N $ . The body initially has a velocity of $ 4 \,m/s $ in the positive $ x $ -direction. Some time later, the body has a velocity of $ 6 \,m/s $ in the positive $ y- $ direction. The work done on the body by the $ 5 \,N $ force during this time is

  • 20 J
  • 40 J
  • 50 J
  • 72 J
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• 5.

  $ 0.002\, M $ solution of a weak acid has an equivalent conductance $ (\wedge) 60\, ohm^{-1}\, cm^{2}\, eq^{-1} $ . What will be the $ pH $ ? (Given : $ \wedge = 400 \, ohm^{-1} \, cm^{2} \, eq^{-1} $ ]

  • $ 3.52 $
  • $ 2.52 $
  • $ 1.87 $
  • $ 2.7 $
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• 6.

  The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at $ 25^{\circ}C $ are $ 3.0 \times 10^{-4} \, s^{-1} $ , $ 104.4 \, kJ \, mol^{-1} $ and $ 6.0 \times 10^{14} \, s^{-1} $ , respectively. The value of the rate constant at $ T \rightarrow \infty $ is

  • $ 2.0 \times 10^{18} \, s^{-1} $
  • $ 6.0 \times 10^{14} \, s^{-1} $
  • $ 3.6 \times 10^{30} \, s^{-1} $
  • Infinity
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