Question

Which of the following statements are corrects?

• A. The unit of rate constant for a zero order reaction is mole $litr{e}^{-1}se{c}^{-1}$.
• B. Half life of a first order reaction is inversely proportional to rate constant.
• C. For zero order reaction rate constant is equal to the rate of reaction at all concentrations.
• D. For a first order reaction , the rate constant (k) is related to half life $\left(t_{\frac{1}{2}}\right)$ as $k=\frac{0.693}{t_{\frac{1}{2}}}$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A The unit of rate constant for a zero order reaction is mole $litr{e}^{-1}se{c}^{-1}$.
B Half life of a first order reaction is inversely proportional to rate constant.
C For zero order reaction rate constant is equal to the rate of reaction at all concentrations.
D For a first order reaction , the rate constant (k) is related to half life $\left(t_{\frac{1}{2}}\right)$ as $k=\frac{0.693}{t_{\frac{1}{2}}}$

For $1^{st}$ order reaction $t_{\frac{1}{2}}=\frac{0.693}{k}$
For zero order reaction rate $k[A{]}^0$
Therefore all of the above are correct statements.