Which is the correct alternative for X?

Which gas is most abundant in the Earth’s atmosphere by volume?

Which of the following is a characteristic property of acids ?

Which of the following is an example of a physical change?

Which nutrient is mainly responsible for the growth and repair of body tissues?

A body of mass 6 kg accelerates from 6 m/s to 18 m/s in 3 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

The refractive index of water and turpentine oil are 1.33 and 1.47, respectively. A ray of light travels from

A satellite is orbiting Earth at a height where acceleration due to gravity is 5 m/s². If radius of Earth is 6400 km, what is the orbital radius?

With the increase of pressure, the boiling point of any substance –

Which disease is caused by the  Mycobacterium leprae bacteria ?