क्रायोजेनिक तकनीक में प्रणोदक के रूप में उपयोग होने वाले द्रव हाइड्रोजन का तापमान लगभग कितना होता है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?