Section 27 of the Indian Contract Act, 1872 says agreements in restraint of trade are void. In practice, Indian courts have often declined to enforce broad post-employment non-competes.
What tends to hold up better: non-solicitation (don't poach staff/clients for a defined period) and confidentiality obligations. Restraints during employment are treated differently from those after it ends.
Have any restraint clause reviewed by a lawyer for your situation. This is general information, not legal advice.