Question

In alkaline hydrolysis of tertiary butyl bromide, ____________.

Options

• rate of reaction is doubled as the concentration of the substrate is doubled

• rate of reaction is halved as the concentration of any one of reactant is doubled

• rate is doubled, as concentration of nucleophile is doubled

• rate is independent of concentration of the reactants

Answer 1

In alkaline hydrolysis of tertiary butyl bromide, rate of reaction is doubled as the concentration of the substrate is doubled.

Explanation:

The SN¹ mechanism is used in the alkaline hydrolysis of tertiary butyl bromide.

∴ Rate of reaction ∝ [(CH₃)₃C - Br]

∴ When the concentration of tertiary butyl bromide is increased, the rate doubles. The rate of reaction in the SN¹ mechanism is independent of nucleophile concentration.