Important Questions of Chemical Kinetics Chemistry | Zigya

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
71.

For a first order reaction, the half-life period is

  • dependent on the square of the initial concentration

  • dependent on first power of initial concentration

  • dependent on the square root of initial concentration

  • independent on initial concentration


72.

A radioactive isotope having t1/2 = 3 days was read after 12 days. If 3g of isotope is contained in container, the initial weight of isotope was

  • 12g

  • 24g

  • 36g

  • 48g


73.

After how many seconds will the concentration of the reactant in a first order reaction be halved if the rate constant is 1.155 x 10-3 s-1?

  • 600

  • 100

  • 60

  • 10


74.

For a reaction,  A + 2B  C, rate is given by +d[C]dt= k [A] [B],hence, the order of the reaction is

  • 3

  • 2

  • 1

  • 0


Advertisement
75.

In a multistep reaction, the overall rate of reaction is equal to the

  • rate of slowest step

  • rate of fastest step

  • average rate of various step

  • the rate of last step


76.

The first order integrated rate equation is

  • k = xt

  • k = 2.303t logaa - x

  • k = 1t  ln aa - x

  • k = 1txa(a - x)


77.

For nuclear fusion reactions, the fusion temperature is of the order of

  • 105 K

  • 103 K

  • 107 K

  • 100 K


78.

Unit of decay constant of radioactive disintegration is

  • time

  • min-2

  • time-1

  • time mol-1


Advertisement
79.

A first order reaction is given as A  products. Its integrated equation is

  • k = 2.303tlog  a-xa

  • k = 1t log aa-x

  • k = 2.303t log aa-x

  • -k = 1t log a -xa


80.

The units of rate constant for first order reaction are

  • mol L-1s-1

  • s-1

  • Lmol-1s-1

  • L2mol-2s-1


Advertisement