Exchange rubles on rupees, of course, you can .But only to bring them to India will not work, as well as to take them out from there, because it is prohibited by Indian law..When leaving the country, you can proceed as follows: go to the bank and exchange rupees for some other currency .After you do this, be sure to ask your bank for a certificate of direct exchange .It will be considered valid for three months .In addition, you can use an international card from which you can withdraw money in rupees directly at ATMs or directly pay it in a number of hotels, shops and restaurants..Then problems with import or export will not be .