64 bills pending in Parliament, says research group

Sixty-four bills, including the controversial land acquisition legislation, are pending in the Parliament at various stages, a study group that tracks legislative developments in the country has said.
According to PRS Legislative Research, other important pending bills are GST Bill (122nd Amendment Bill); Prevention of Corruption (Amendment) Bill, 2013 and Whistleblowers Protection (Amendment) Bill, 2015.
There are some bills like Companies (Amendment) Bill, 2014; Regional Rural Banks (Amendment) Bill, 2014 and Public Premises (Eviction of Unauthorised Occupants) Amendment Bill, 2014 which have been passed in Lok Sabha, but are waiting the approval of Rajya Sabha to become a law.
There are some bills like the Nuclear Safety Regulatory Authority Bill, 2011 which were introduced by the then UPA government but are yet to be passed by the Parliament.

The government has a majority in Lok Sabha, but does not have the required number in Rajya Sabha, which has resulted in non-passage of many legislations. For a bill to come into force and get a Presidential Assent so that it can become an Act, it has to be passed by both the Houses.