Which was the first petrochemical company in India?

In January 2023, Union Minister of Education and Skill Development and Entrepreneurship Dharmendra Pradhan along with Minister for Railways, Communications, Electronics & Information Technology, Ashwini Vaishnaw successfully tested ‘BharOS’, a made-in-India mobile operating system developed by ________.

Padma Bhushan awardee, Alarmel Velli, who is renowned for Bharatanatyam, is also an exponent of which of the following dance forms?

In 1808, whose work provided a physical picture of how compounds are formed by the combination of two or more different types of atoms?