For renewal of passport you have to disclose earlier issue of passport
2) suppression of material facts is an offence and penalty can be imposed upon you
3) Section 12 of the Passport Act, 1967 deals with Offences and Penalties and Section 12(1)(b) specifies whoever knowingly furnishes any false information or suppresses any material information with a view to obtaining a passport or travel document under this Act or without lawful authority alters or attempts to alter or causes to alter the entries made in a passport or travel document" shall be punishable with imprisonment for a term which may extend to six months or with fine which may extend to five thousand rupees or with both.
4) you would be issued passport with date of birth mentioned in earlier passport