# NEET Chemistry Chemical Kinetics Questions Solved

(a) Explain the following terms :

(i) Rate of a reaction

(ii) Activation energy of a reaction

(b) The decomposition of phosphine, PH3, proceeds according to the following equation:

4PH3 (g) $\to$P4(g) + 6 H2(g)

It is found that the reaction follows the following rate equation:

Rate = K[PH3].

The half - life of PHis 37.9 s at C.

(i) How much time is required for 3/4 th of PHto decompose?

(ii) What fraction of the original sample of PHremains behind after 1 minute?

Concept Videos :-

#8 | Problems on 1st Order Reaction (Type 1)
#9 | Problems on 1st Order Reaction (Type 2)
#10 | Problems on 1st Order Reaction (Type 3)
#12 | Problems on 1st Order Reaction (Type 5)

Concept Questions :-

First Order Reaction Kinetics