Question

Time required to decompose $SO_2Cl_2 $ to half of its initial amount is $60 $ minutes. If the decomposition is a first order reaction, the rate constant of the reaction is

• A. $1.92 \times 10^{-4} s ^{-1}$
• B. $3 \times 10^{-2} s ^{-1}$
• C. $5 \times 10^{-3} s ^{-1}$
• D. $4.75 \times 10^{-4} s ^{-1}$

Answer 1

Answer: (A)

For a first order reaction, $k=\frac{0.693}{t12 } $
or $ k =\frac{0.693}{60\times60} =1.925\times10^{-4} s^{-1}$