Which organisation offers free online self-certification course - Corona Warriors - for frontline health workers to deal with COVID-19 patient?

Scientists from which institute reported that the largest hole in the Ozone layer spreading over 1 million square kilometers above the Arctic has closed due to unusual atmospheric conditions?

Which state's Chief Minister launched the Jagananna Vidya Deevena Scheme on 28 April?

President of the United States Donald Trump nominated which diplomat as America's next envoy to the Organisation for Economic Cooperation and Development (OECD)?

World Day for Safety and Health at Work is observed on which date?

States including Punjab, Kerala, and Delhi have sought the Government of India for extension of goods and services tax (GST) compensation to the states for how much time beyond 2022?

Which institute has designed a safe and multi-surface sanitizer using UV light for the disinfection of devices in the combat against COVID-19?

Which State government has announced an insurance cover of Rs.50 lakh for the frontline journalists who are covering COVID-19?