1. Date of purchase and sale is deleted. Please write in this format 05 July 2019.
2. Yes, you can purchase NHAI/REC bonds upto Rs. 50 lacs from the date of the transfer of the asset and you need to invest only the capital gain.
3. Yes, remaining amount can be invested in the FD in your wife name but clubbing provisions will be applicable for interest income.
4.No
5. No
Dates are missing in your question. Please see the question again. How can i calculate the indexed cost of acquisition without date of purchase and sale?