The major component of modern Olympic gold medals is ____________.

In Indian constitution, the method of election of President has been taken from which country?

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____.

Plants tissues are of how many types?

Which of the following was published by Gandhi when he was in South Africa?

A flying aeroplane has _____. 

An object is in static equilibrium when it is ________.  

Acetic acid is known as ________.