Capital gain scheme related

Section 54F: Entire sale consideration and not only capital gain should be invested to buy a new residential house property .

Section 54EC you can save the tax on your capital gains, by investing them in certain bonds. Bonds issued by the National Highway Authority of India (NHAI) or Rural Electrification Corporation (REC) 

If capital gains have not been invested until the date of filing of return (usually 31st July) of the financial year in which the property is sold, the gains can be deposited in capital gains account scheme.

can i buy vacant land before 31-07-2018. is 54f applicable or not.

Purchase of vacant land is not eligible investment exemption under section 54F .