Tax implications on money transferred to mother's account

Currently, I'm earning enough and want to transfer all of my salary credited to my mother's (housewife) account and then invest (60k+ PM) it in MF or stocks or other instruments. 1. Is it legally ok? 2. Will it be considered under money laundering? 3. Can there be any tax implications on the money transferred? 4. Upto how much money I can transfer in a year without any issues?