RRB NTPC General Science

Question 1

The chemical formula of water is:

Accepted Answer

H2O

Answer

Water is composed of two hydrogen atoms and one oxygen atom, giving the formula H₂O.

Question 2

Which organ in the human body produces insulin?

Accepted Answer

Pancreas

Answer

Insulin is produced by the beta cells of the pancreas to regulate blood sugar levels.

Question 3

The unit of electric current is:

Accepted Answer

Ampere

Answer

Electric current is measured in Amperes (A), named after André-Marie Ampère.

Question 4

Which gas is most abundant in Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas.

Question 5

The speed of light in a vacuum is approximately:

Accepted Answer

3 × 10⁸ m/s

Answer

The speed of light in a vacuum is approximately 3 × 10⁸ metres per second (300,000 km/s).

RRB NTPC Practice Test