Question

For the elementary reaction, $2A+B⟶C+D$, the concentration of $B$ is kept constant and that of $A$ is tripled the new rate of reaction will be:

• A. nine times the older
• B. three times the older
• C. remains the same
• D. becomes zero

Answer 1

The correct option is A nine times the older

Since $rate=K\left(A{)}^2\right(B)$ , so when when $A$ is tripled and put in the expression you will get the new rate to be $9$ times than that of initial rate.