Questions

The percentage of nitrogen in the air is about

How many atoms are present in one molecule of Ozone?

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
He could excel in his board exams only after _____ very hard.

The new symbol of Indian currency is designed by

Who among the following is also the Chairman of the Planning Commission?

The members of the All India Services serve the

A body has a weight W on the surface of Earth. What is its weight on a planet whose mass is 15 times that of Earth and a radius that is 4 times that of the earth?

What is the unit of calorific value?