Question

(i)CH3CH3 + Cl2→CH3CH2Cl+HCl (ii)CH3CH(OH)CH→CH3CH=CH2+H2O (iii)CH3CHO+HCN→CH3CH(OH)CN (iv)CH3CH=CH2+HBr→CH3CHBrCH3 (v)CH3CH2C(OH)=CH2→CH3CH2COCH3 State the reaction type?

Answer 1

These are examples of five different reaction types.

Explanation:

(i) `"CH"_3"CH"_3 + "Cl"_2 → "CH"_3"CH"_2"Cl" + "HCl"`

This is a free radical substitution reaction.

(ii) `"CH"_3"CH(OH)CH"_3 → "CH"_3"CH=CH"_2 + "H"_2"O"`

This is a dehydration or elimination reaction.

(iii) `"CH"_3"CHO" + "HCN" → "CH"_3"CH(OH)CN"`

This is a nucleophilic addition reaction.

(iv) `"CH"_3"CH=CH"_2 + "HBr" → "CH"_3"CHBrCH"_3`

This is an electrophilic addition reaction.

(v) `"CH"_3"CH"_2"C(OH)=CH"_2 ⇌ "CH"_3"CH"_2"COCH"_3`

This is an example of keto-enol tautomerism.