Zinc metal liberates hydrogen gas on reaction with

Consider the following events in the geological history of India:

1. Formation of Gondwana coal

2. Formation of Himalayas

In which of the following region midnight Sun is visible?

Consider the following statements about our country India:

I. India has an area of about 3.28 million sq. km.

Which region of Earth's atmosphere is the coldest?

To achieve a geosynchronous Earth orbit, a spacecraft should initially be launched into an elliptical orbit with what approximate apoapsis altitude?

‘Palk Strait’ is a narrow channel of sea between-

What is the characteristic feature of Narmada Valley?

Which of the following is the highest peak in the world?

Popocatepetl volcano, which was in news recently, is located in which country?

Machkund Hydroelectric Project is a joint venture of which states?