In a liquid chromatography technique, the mobile phase is a mixture of non-polar n-hexane and polar isopropanol running over a polar silica-packed stationary phase column. This separation technique is called:

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?