Order of a reaction is decided by

What is the order of reaction if the unit of the rate constant is $s^{-1}$?

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

With the help of an example,explain what is meant by a pseudo first order reaction.

For a reaction $2NO_{(g)} + Cl_{2(g)} \rightleftharpoons 2NOCl_{(g)}$,when the concentration of $Cl_2$ is doubled,the rate of reaction becomes two times the original. When the concentration of $NO$ is doubled,the rate becomes four times. What is the order of the reaction?

For a reaction,$A + 2B \longrightarrow C$,the rate is given by $+\frac{d[C]}{dt} = k[A][B]$. Hence,the order of the reaction is: