Singh will administer oath to the newly elected MLAs.
Three other MLAs -- Sunder Lal, Ghanshyam Tiwari and Narayan Singh -- have also been appointed to assist Singh, according to a state government release here.
An eight-time Congress legislator Singh, who represents Rajakhera constituency, will be the pro-tem Speaker till the appointment of a full-time Speaker of the 200-member House.
In the recently held elections, BJP emerged victorious by winning 163 seats whereas the Congress could win on only 21 seats.