The rate of reaction is determined by the slow step of the reaction. This step is called:

The rate law for the reaction $A + B \rightarrow \text{product}$ is $\text{rate} = k[A][B]$. When will the rate of reaction increase by a factor of $2$?

Which of the following for a chemical reaction can never be a fraction?

For a reaction of order $n$,the unit of the rate constant is :

If the surface area of the reactants increases,then the order of the reaction:

At a certain temperature,the half-life periods for the catalytic decomposition of $NH_3$ were found to be as follows:

Pressure $(mm \ Hg)$	$50, 100, 200$
Half-life period $(hrs)$	$3.52, 1.76, 0.88$

What will be the pressure when the half-life period is $2.5 \ hrs$?