Q.Who is competent to contract? Explain the persons who are not competent to contract.

The law only lets certain kinds of people bind themselves by contract, to protect those who cannot fully understand what they are agreeing to.

Section 11 states a person is competent to contract if they are (a) of the age of majority, (b) of sound mind, and (c) not disqualified from contracting by any law they are subject to.

Persons not competent:

• Minors — agreements with a minor are void ab initio; a minor cannot be held liable even for necessaries supplied to him personally (though the supplier may recover the price from the minor's property, if any, under the law of quasi-contract).
• Persons of unsound mind — competence is judged at the time of contracting: a person usually of unsound mind can contract during a lucid interval, while a person usually of sound mind cannot contract during a temporary period of unsoundness (e.g. while intoxicated). …

Saying a minor's contract is merely 'voidable' — it is void ab initio (void from the very start), a strict …