Consider the following statements:

(I) If $\left(\frac{{\mathrm{K}}_{\mathrm{T}+10}}{{\mathrm{K}}_{\mathrm{T}}}\right)$ is defined as the temperature coefficient , then its value decreases with temperature.

(II) Catalyst does not participate in reaction 

The correct statements is/are 

Catalyst are the substances that actually participate in the reaction to form temporary bonds with the reacting species in the intermediate state but do not get consumed in the reaction. Hence (II) is incorrect.

Temperature coefficient of reaction is the factor in which the rate constant of reaction is increased (becomes almost double) on increasing the temperature by a factor of 10⁰ C.

Temperature coefficient is defined as: $\left(\frac{{\mathrm{K}}_{\mathrm{T}+10}}{{\mathrm{K}}_{\mathrm{T}}}\right)$ and its value decreases with a decrease in temperature.