Who was the Governor-General of India during the Sepoy

Who proposed the 'Law of Octaves' in the periodic classification of elements?

Deficiency of which of the following elements is responsible for weakening of bones?

1. Calcium 

2. Phosphorus

3. Nitrogen

What is the chemical name of baking soda?

Which of the following is the hardest mineral?

Marble is a metamorphic rock of:

The process of depositing a layer of any desired metal on another material by means of electricity is called:

Biofertilizers convert nitrogen to:

Naphthalene balls, commonly used as a pest repellent, are derived from which source?

Perspiration cools the body because

A radioactive substance emits?