capital gain exemption sale of house property

i hv already self occupied property and i want to sell one my additional residential house i hv below queries as under
1. can i get exemption under section 54 on sale of property for long term capital gain by purchase additional new house. After this purchase i have 2 house so can i get exemption under section 54
2. whether new house which will purchasing it will treat as deemed let out property and i need to pay every year tax on deemed rental income