Catalyst decomposition of hydrogen peroxide is a ........ order reaction

Write general equation of reaction and explain - what is order of reaction ? Which is its value ?

For a reaction, $A+B \rightarrow$ Product; the rate law is given by, $r=k[ A ]^{1 / 2}[ B ]^{2}$ What is the order of the reaction?

For a chemical reaction $Y + 2Z \to $ Product, rate controlling step is $Y\, + \frac{1}{2}Z\, \to Q$  If the concentration of $Z$ is doubled, the rate of reaction will

Which of the following is correct ?

Half-life period of a first order reaction is $1386$ seconds. The specific rate constant of the reaction is