Question

Identify the correct statement :

• A. Half life of first order reaction is independent of temperature
• B. For zero order reaction, half life depends on initial concentration of reactant
• C. A reactant molecule having sufficient energy must get converted into product
• D. First order reaction must be complex

Answer 1

The correct option is B For zero order reaction, half life depends on initial concentration of reactant

(a) $\left(t_{1/2}\right)$ first Order : $\frac{0.693}{k}$
depends on tempertaure because rate constant will change with change in temperature.

(b) For zero Order reaction $\left(t_{1/2}\right)=\frac{A_0}{2k}$
Half life depends on initial concentration.

(c) Not necessary. It should have proper orientation as well.

(d) It can be elementary also.