point wise reply to your query is as under :-
“I am going to lend money (10 lakhs) for my friend in order to purchase a property. “
Good. Go ahead, Your money his property and later inability to pay back. No mortgage of property in your favour no pawning of jewellery.
Why he cannot borrow from bank (i) either bank does not find him in paying capacity (ii) or he is not credit worthy (iii) or property is not with marketable title ; and finally (iv) Bank officials are not stupid. (v) Bank will recover back the money with interesst you you will not get even the principle.
Later on you keep begging behind him and receive threats from him.
रखना बजुर्गों का यह कौल सीख
पहले दे उधार फिर मांग भीख