1. She is free to sell the house if the sale deed is registered in her favour. She can seek injunction from the court to restrain him from impeding the sale of property and delivery of possession to the buyer. He has no right to claim a share through partition if the sale deed is registered entirely in her favour.
2. The ground for divorce is mental cruelty.
3. She can also sue him to claim maintenance from him. No alimony is to be paid by her.