Rawat was administered the oath of office and secrecy by Governor Krishna Kant Paul.
Prime Minister Narendra Modi, Bharatiya Janata Party (BJP) chief Amit Shah, Union Ministers Rajnath Singh, Jagat Prakash Nadda and Uma Bharti are among the several dignitaries who attended the swearing-in ceremony.
Prakash Pant, Madan Kaushik, Yashpal Arya, Subodh Uniyal and Rekha Arya are the other BJP MLAs who took oath as ministers with Rawat.
Ahead of his swearing-in ceremony, Rawat paid tributes at Shaheed Smarak here.
The former Rashtriya Swayamsevak Sangh(RSS) Pracharak, who succeed Congress leader Harish Rawat yesterday assured that he would provide a corruption-free government to Uttarakhand and would work for the upliftment of the poor.
In the recently-concluded assembly polls, the BJP won with a clear majority with 57 seats in the 70-member Uttarakhand Assembly, thereby ousting the Congress that managed to win just 11 seats this time.
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