CUET Chemistry Question Paper 2024 Set B (Available)- Download Solutions and Answer Key pdf

CUET Questions

• 1.

  The molecularity of the following elementary reaction is NH4NO2 —> N2 + 2H20 

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  • One

  • Two

  • Three

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• 2.

  The decomposition of NH3 on platinum surface is zero order reaction. If k = 2.5 x 10-4 mol L-1 s-1 the rate of production of H2 is

  • 2.5 x 10-4 mol L-1 s-1

  • 7.5 x 10-4 mol L-1 s-1

  • 5.0 x 10-4 mol L-1 s-1

  • 10.0 x 10-4 mol L-1 s-1

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• 3.

  Rate constant "k" for a certain reaction is k = \(2.3 \times 10^{-5}\) \(L\) \(mol^{-1}\) \(s^{-1}\). Order of the reaction is:

  • 0
  • 1
  • 2
  • 3
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• 4.

  The incorrect equation for Arrhenius equation for activation energy is:

  • \(In\;k= In\;A-\frac{Ea}{RT}Ine\)
  • \(\log k=-\frac{Ea}{2.303R}\frac{1}{T\times\log A}\)
  • \(\log \frac{k_2}{k_1}=\frac{Ea}{2.303R}(\frac{T_2-T_1}{T_1T_2})\)
  • \(\log k=-\frac{Ea}{2.303R}\times \frac{1}{T}+\log A\)
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• 5.

  Ammonia is manufactured by:
  \[ \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) \quad \Delta H_f^\circ = -46.1 \, \text{kJ/mol} \] The various steps involved are:
  (A) Condensation of mixture of gases
  (B) Passing the gaseous mixture over catalyst
  (C) Compression of the mixture of gases
  (D) Recirculation of the gaseous mixture
  Choose the correct answer from the options given below:
  

  • (C), (B), (A), (D)
    
  • (B), (C), (D), (A)
    
  • (A), (D), (C), (B)
    
  • (B), (A), (D), (C)
    
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• 6.

  The half-life of a first-order reaction is 25 minutes. Its rate constant is:
  

  • \( 2.27 \times 10^{-2} \, \text{min}^{-1} \)
    
  • \( 3.2 \times 10^{-3} \, \text{min}^{-1} \)
    
  • \( 9.2 \times 10^{-2} \, \text{min}^{-1} \)
    
  • \( 2.8 \times 10^{-2} \, \text{min}^{-1} \)
    
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