A first order reaction take $30$ minutes for $75\%$ decomposition, calculate its rate constant ?

Rate constant of decomposition of hydrogen peroxide is $0.0204\ \text{minutes}^{-1}$, calculate half life of reaction.

Which of the following properties of colloid is used to measure the rate of migration of sol particles?

Which among the following oxoacids of chlorine exhibits $+3$ oxidation state of chlorine?