CBSE  /  Class 12  /  Chemistry  /  Chemical Kinetics

  • 1. 
    In chemical equation H (g) + I (g) \(\rightleftharpoons\) 2HI (g) the equilibrium constant K depends on

  • total pressure
  • catalyst used
  • amount of H and I
  • temperature

  • 2. 
    If the rate of a reaction is expressed by, rate = A [A]² [B], the order of reaction will be

  • 2
  • 3
  • 1
  • 0

  • 3. 
    In a reaction, 2X → Y, the concentration of X decreases from 0.50 M to 0.38 M in 10 min. What is the rate of reaction in Ms

  • 2 × 10
  • 4 × 10
  • 2 × 10
  • 1 × 10

  • 4. 
    The decomposition of dimethyl ether is a fractional order reaction. The rate is given by rate =k(PCH

  • 5. 
    How long time will 5 g of this reactant take to reduce to 3 g?

  • 444 s
  • 400 s
  • 528 s
  • 669 s

  • 6. 
    A reaction in which reactants (R) are converted into products (P) follows second order kinetics. If concentration of R is increased by four times, what will be the increase in the rate of formation of P?

  • 9 times
  • 4 times
  • 16 times
  • 8 times

  • 7. 
    For a reaction nx – y → z the rate of reaction becomes twenty seven times when the concentration of X is increased three times. What is the order of the reaction?

  • 2
  • 1
  • 3
  • 0

  • 8. 
    The rate constant of a reaction depends upon

  • temperature of the reaction
  • extent of the reaction
  • initial concentration of the reactants
  • the time of completion of reaction

  • 9. 
    The unit of rate and rate constant are same fora

  • zero order reaction
  • first order reaction
  • second order reaction
  • third order reaction

  • 10. 
    The number of molecules of the reactants taking part in a single step of the reaction is indicative of

  • order of a reaction
  • molecuiarity of a reaction
  • fast step of the mechanism of a reaction
  • half-life of the reaction
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