What are the powers and functions of the chairperson of the Rajya Sabha?

The Vice President of India is the chairperson of Rajya Sabha to perform the following
functions:
 To preside over the meetings of Rajya Sabha.
 To allow members to speak.
 To maintain relevance in debates and to stop the members if anyone uses
un¬parliamentary language.
 He is the custodian of the diginity of house and protects the privileges of the
members of the Rajya Sabha.
 He preserves order in the house and if situation goes out of control he can suspend
the meetings.
 He is not allowed to vote, but in case of equality of votes, he has a casting vote.