List of top Chemistry Questions on Chemical Kinetics asked in CBSE Compartment XII

For a chemical reaction A \(\rightarrow\) B, it was observed that the rate of reaction doubles when the concentration of A is increased four times. The order of the reaction is:

The thermal decomposition of an acid is a first-order reaction with a rate constant of \(2.3 \times 10^{-5}\ \text{s}^{-1}\) at a certain temperature. Calculate how long it will take for three-fourths of the initial quantity of acid to decompose. (\(\log 4 = 0.6021\), \(\log 2 = 0.3010\))

Hydrolysis of sucrose: \[ \ce{C_{12}H_{22}O_{11} + H2O \xrightarrow{H^+} C_6H_{12}O_6 + C_6H_{12}O_6} \] (a) Rate law equation
(b) Molecularity and order of reaction
(c) What do you call such reactions?

Assertion (A): Rate constant increases with increase in temperature.
Reason (R): Increasing the temperature of the substance increases the fraction of molecules which collide with energies greater than activation energy.