Question : Which of the following gases is used in a bulb?

Option 1: Hydrogen

Option 2: Carbon dioxide

Option 3: Carbon monoxide

Option 4: Argon

Question : Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are

Option 1: Boron and Cadmium

Option 2: Boron and Plutonium

Option 3: Cadmium and Uranium

Option 4: Uranium and Boron

Question : What is the valency of Boron?

Option 1: 2

Option 2: 3

Option 3: 4

Option 4: 1

Question : Which odourless, colourless, tasteless and chemically unreactive gas was invented by Daniel Rutherford in 1772 and was independently isolated at the same time by Carl Wilhelm Scheele and Henry Cavendish?

Option 1: Nitrogen

Option 2: Argon

Option 3: Fluorine

Option 4: Oxygen

Question : Ozone consists of which of the following?

Option 1: Oxygen only

Option 2: Oxygen and Nitrogen

Option 3: Hydrogen and Carbon

Option 4: Oxygen and Carbon