Question

Select the Correct statement :

• A. In the Chlorination of n-butane , 2-Chlorobutane is formed faster than 1-Chlorobutane
• B. Bromine is less reactive towards alkanes in general than Chlorine but Bromine is more selective in the site of attack when it does react.
• C. Reactivity towards alkanes is F₂ > Cl₂ > Br₂ > I₂
• D. None of the above

Answer 1

Answer: (A), (B), (C)

The correct options are
A

In the Chlorination of n-butane , 2-Chlorobutane is formed faster than 1-Chlorobutane

B

Bromine is less reactive towards alkanes in general than Chlorine but Bromine is more selective in the site of attack when it does react.

C

Reactivity towards alkanes is F₂ > Cl₂ > Br₂ > I₂

a) Chlorination is free radical substitution. 2-Chlorobutane forms 3.8 times as fast as 1-Chlorobutane.

Chlorination is faster $\Rightarrow$ More reactive.

But Bromination is highly selective

Reactivity is $F_2>C{l}_2>B{r}_2>I_2$

So a), b) and c) are all correct.