Question

If doubling the concentration of the reactant $A$ increases the rate by $4$ times and tripling the concentration of $A$ increases the rate by $9$ times, the rate is proportional to?

• A. Concentration of $A$
• B. Square concentration of $A$
• C. Under root concentration of $A$
• D. Cube of concentration of $A$

Answer 1

The correct option is B Square concentration of $A$

Given:

If doubling the concentration of reactant $A$ rate increase by $4times$

If tripling the the concentration of reactant $A$ rate increase by $9times$

So $Rate=[A{]}^2$

$2^2=when\left[A\right]isdoubled$

$3^2=when\left[A\right]istripled$

So option B is correct.