Question : How many isotopes of hydrogen elements are there?

Option 1: 2

Option 2: 3

Option 3: 4

Option 4: None of the options is correct

Question : In 1942, which one of the following was discovered by Enrico Fermi?

Option 1: Atomic Reactor

Option 2: Atom bomb

Option 3: Diode Bulb

Option 4: None of the options is correct

Question : What does the first step of the theory of "demographic transition" indicate?

Option 1: High birth rate and high death rate

Option 2: Low death rate and high birth rate

Option 3: Low birth rate and low death rate

Option 4: All options are correct

Question : Which of the following controls the wind speed?

Option 1: Pressure gradient

Option 2: Rotation of Earth

Option 3: Insolation

Option 4: None of the options is correct

Question : What is the term used to refer to the process of conversion of water vapour back to water?

Option 1: Evaporation

Option 2: Sublimation

Option 3: Freezing

Option 4: Condensation