Mr Purohit, a former governor of Assam, will be sworn in tomorrow at 9.30 AM, a Raj Bhavan communique said.
The government bade farewell to Maharashtra Governor Ch Vidyasagar Rao, who had been holding additional charge of Tamil Nadu since last year, as Purohit arrived in the city today amid heavy rains.
Mr Rao had come under criticism from principal opposition DMK for not ordering the floor test as demanded by it after 18 MLAs, now disqualified, had expressed lack of confidence in the chief minister.
His year-long tenure in Tamil Nadu was marked by a series of significant developments including the demise of AIADMK supremo J Jayalalithaa in December, 2016, and the swearing in of two chief ministers in the span of two months.
Mr Purohit was received by Chief Minister K Palaniswami and his deputy O Panneerselvam at the airport.Assembly Speaker P Dhanapal and state ministers also welcomed him.
He later received a police guard of honour.
Earlier, Palaniswami and Panneerselvam bade farewell to Mr Rao at the airport. He left for Hyderabad by a special flight. Mr Purohit will become the full-time governor of the state after the retirement of K Rosaiah in August 2016.
Mr Purohit, appointed last week amid growing calls for a full-time governor, was a public personality inseparably involved in social, political, educational and industrial fields of Vidarbha in Maharashtra.