Question

The rate constant of the reaction $A\to B$ is $0.6\times {10}^{-3}mol{L}^{-1}{s}^{-1}$. If the concentration of $A$ is $5M$ then concentration of $B$ after $20$ minutes is

• A. $0.72M$
• B. $1.08M$
• C. $3.60M$
• D. $0.36M$

Answer 1

The correct option is A $0.72M$

For zero order reaction, rate constant is $mol{L}^{-1}{s}^{-1}$.
Hence concentration of $B$ after $20$ minutes $=KT$
$=0.6\times {10}^{-3}\times 20\times 60$
$=0.72M$