He was administered the oath of office and secrecy by Patna High Court Chief Justice J N Bhat, in a ceremony at the Raj Bhavan.
Chaudhary is the first Dalit leader to occupy the august office.
The deputy Speaker would be from the Opposition.
Raja Bhiayya's resignation from the ministerial job was accepted by UP Governor T V Rajeswar on Sunday.
The District Magistrate of Pratapgarh, R S Verma, has asked officials to locate the files at the earliest.
The case had created a furore across the country after it came to light that the NHAI engineer had written a letter to then prime minister Atal Bihari Vajpayee citing irregularities in the Golden Quadrilateral Project.
Congress president Rahul Gandhi met Rajasthan Chief Minister Ashok Gehlot and his deputy Sachin Pilot separately.
Terming the incident as serious, UP CM Yogi Adityanath has ordered a probe.
Congress President Sonia Gandhi on Saturday accused the Narendra Modi government of posing a threat to the Indian ethos of pluralism and trying to wipe out the Nehruvian legacy of tolerance.
A guilty verdict could impact Google's growth in India
Two state ministers have also come out in the open to demand a detailed assessment by the top leadership.
As Bihar awaits the results in the much-awaited polls, Rediff.com takes a look at some of those leaders who won and lost.
As many as 30 sub-groups and committees worked tirelessly to devise rules and laws as well as fix tax rates for over 1,200 goods and services.
Members of JD-U, RJD and Congress which have given enough hint of fighting together against BJP in the coming state assembly election next year, jointly rushed into the well of both the Houses demanding action against Dhankhar and his "close friend" Sushil Kumar Modi.
The Janata Dal-United, Rashtriya Janata Dal and Congress legislators on Wednesday created ruckus in both Houses of Bihar legislature over recovery of Rs 1.14 crore, $600 and ornaments stolen from the house of Bharatiya Janata Party MP Giriraj Singh and demanded his arrest and termination of Parliament membership alleging it as "black money".
Critics say that there's no 'Modi wave' in four Muslim-dominated parliamentary constituencies in Bihar's Seemanchal belt, but Bharatiya Janata Party leaders are hopeful to retain three out of the four seats here. In 2009 general elections, the BJP won in Purnea, Katihar and Araria but lost in Kishanganj.
India on Monday did some plain-speaking with China over its blocking of the Indian bid to get JeM chief Masood Azhar banned by the UN and warned the global community of "serious consequences" if it continues to adopt "double standards" in dealing with terrorism.
The 25-year-old's story is an inspiration for young Indians.
A report on South Asian youth demolishes model minority myth, says George Joseph
Rediff Reader Ansh M visited Udaipur recently and came back with a bagful of memories!
Mauled in the Lok Sabha elections and facing dissidence within, Bihar Chief Minister Nitish Kumar resigned on Saturday but interestingly did not seek dissolution of the assembly injecting a dramatic turn in the state politics.
Aggressive campaigning and the existing 'Modi wave' and a lack of will on part of the Congress has put the ruling Bharatiya Janata Party in Rajasthan far ahead of others. The party is comfortably placed in 21 out of the 25 seats, and they have been able to do this because of maintaining the same tempo that enabled them to defeat the Congress badly in December's assembly elections. P B Chandra reports
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