Can I purchase land and building taking loan from bank in my name and got the registration of the properties in my son's name and mortgage the same in the bank.
I think you mean:
Can I purchase a property with a bank loan in my name, but title the property to my son?
Not as you have stated it.
The property must secure the loan (if the loan is on the property).
You cannot get a loan on a piece of property which you don't own - because the bank couldn't attach a lien to it in that case.
They won't give you the loan on it in that circumstance.
If that were allowed, you could:
1. get the loan
2. purchase the property titled in your son's name
3. then declare bankruptcy without making a single payment
4. and your son would be able to keep the property
You can do one of the following:
You can get an unsecured loan from the bank. Then you can use that money for whatever you want (including using it to purchase a property which you title in your son's name instead of yours)
You can put both your names on the loan and title it to your son with a bank lien on the property.
You can put both your names on the property with a bank lien on the property.