RRB NTPC General Science 1 — Questions and Answers
Question 1: The chemical formula of water is:
- HO
- H2O (Correct answer)
- H2O2
- OH
Correct answer: H2O
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?
- Liver
- Kidney
- Pancreas (Correct answer)
- Stomach
Correct answer: Pancreas
Insulin is produced by the beta cells of the pancreas to regulate blood sugar levels.
Question 3: The unit of electric current is:
- Volt
- Watt
- Ampere (Correct answer)
- Ohm
Correct answer: Ampere
Electric current is measured in Amperes (A), named after André-Marie Ampère.
Question 4: Which gas is most abundant in Earth's atmosphere?
- Oxygen
- Carbon Dioxide
- Nitrogen (Correct answer)
- Argon
Correct answer: Nitrogen
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:
- 3 × 10⁶ m/s
- 3 × 10⁸ m/s (Correct answer)
- 3 × 10¹⁰ m/s
- 3 × 10⁴ m/s
Correct answer: 3 × 10⁸ m/s
The speed of light in a vacuum is approximately 3 × 10⁸ metres per second (300,000 km/s).
Question 6: Which vitamin is produced by the human body when exposed to sunlight?
- Vitamin A
- Vitamin B12
- Vitamin C
- Vitamin D (Correct answer)
Correct answer: Vitamin D
The skin synthesizes Vitamin D when exposed to ultraviolet (UV) rays from sunlight.
RRB NTPC General Science 1
The chemical formula of water is: