If $50\%$  of a reaction occurs in $100$ seconds and $75\%$ of the reaction occurs in $200$ seconds, the order of this reaction is

For a certain reaction the expression for half life is $t \propto \frac{1}{{{a^{n - 1}}}}$ then the order of reaction is

The mechanism of the reaction $2NO_2 + F_2 \to 2NO_2F$ is

$(i)\,\,N{O_2}\,\xrightarrow{{slow}}\,NO + O$

$(ii)\,\,{F_2} + O + NO\,\xrightarrow{{fast}}\,N{O_2}F + F$

$(iii)\,\,F + N{O_2}\,\xrightarrow{{fast}}\,N{O_2}F$

Select the correct one

The rate of reaction $A + 2B \to 3C$ becomes $72\, times$ when concentration of $A$ is tripled and concentration of $B$ is doubled then the order of reaction with respect to $A$ and $B$ respectively is

The specific rate constant of a first order reaction depends on the

For a reaction of order $\mathrm{n}$, the unit of the rate constant is :