1)second marriage during subsistence of earlier marriage is illegal .
2) Section 11 of Hindu Marriage Act, 1955 deals with:
Nullity of marriage and divorce- Void marriages - Any marriage solemnized after the commencement of this Act shall be null and void and may, on a petition presented by either party thereto, against the other party be so declared by a decree of nullity if it contravenes any one of the conditions specified in clauses (i), (iv) and (v), Section 5 mentioned above.
3)conditions of valid marriage section 5
A marriage may be solemnized between any two Hindus, if the following conditions are fulfilled, namely:
(i) Neither party has a spouse living at the time of the marriage;
4)court will pass order for annullment of your marriage