This article will guide you what is Void & Voidable Marriage under Hindu Marriage Act. under section 11 & 12
Section- 11: Void Marriage:
Any marriage solemnized after the commencement of Hindu Marriage Act shall be null and void in case a petition is presented by either party against the other in a marriage, is declared so by a decree of nullity on a finding that it is in contravention of any one of the conditions specified in clauses (i), (iv) and (v) of section 5.
Section-12: Voidable Marriages:
(1) Any marriage solemnized, whether before or after the commencement of this Act, shall be voidable and may be annulled by a decree of nullity on any of the following grounds, namely:—
(a) that the marriage has not been consummated owing to the impotence of the respondent; or]
(b) that the marriage is in contravention of the condition specified in clause (ii) of section 5; or
(c) that the consent of the petitioner, or where the consent of the guardian in the marriage of the petitioner was required under section 5 as it stood immediately before the commencement of the Child Marriage Restraint (Amendment) Act, 1978 (2 of 1978)], the consent of such guardian was obtained by force [or by fraud as to the nature of the ceremony or as to any material fact or circumstance concerning the respondent]; or
(d) that the respondent was at the time of the marriage pregnant by some person other than the petitioner.