The first satellite of India sent into space

Lexan is a man-made polymer used for making

______ is defined as the number of moles of solute per litre of solution.

What is the chemical name of Plaster of Paris?

Carbohydrates are organic compounds composed of which elements? 

Which gas is most abundant in the Earth's atmosphere.

The mine explosions are mostly caused by the combination of air with which gas?

What is the common name of the compound with the formula C6H5NH2?

Which fuel has the highest calorific value?

Which of the following gas is used to fill balloons.

Which enzyme is responsible for converting complex starch into simple sugars?