2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Chemical Kinetics / रासायनिक बलगतिकी

JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Rate law and Rate Constant

  • question_answer
    After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is \[\text{1}\text{.155}\times \text{1}{{\text{0}}^{\text{-3}}}{{\sec }^{-1}}\]        [CBSE PMT 2000]

    A)                 100 sec 

    B)                 200 sec

    C)                 400 sec 

    D)                 600 sec

    Correct Answer: D

    Solution :

               \[t=\frac{2.303}{k}\log \frac{a}{a-x}\]                                 \[t=\frac{2.303}{1.155\times {{10}^{-3}}}\log \frac{100}{100-50}=600\,\,\sec \]


You need to login to perform this action.
You will be redirected in 3 sec spinner