कमरे के तापमान पर निम्नलिखित में से किस पदार्थ का रैखिक तापीय प्रसार गुणांक (coefficient of linear thermal expansion) सबसे अधिक होता है?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?