RRB NTPC General Science 2 — Questions and Answers
Question 1: Newton's First Law of Motion is also known as the Law of:
- Acceleration
- Inertia (Correct answer)
- Action-Reaction
- Gravitation
Correct answer: Inertia
Newton's First Law states that a body remains at rest or in motion unless acted upon by a force, which is the Law of Inertia.
Question 2: Which element has the atomic number 1?
- Helium
- Oxygen
- Hydrogen (Correct answer)
- Carbon
Correct answer: Hydrogen
Hydrogen has atomic number 1, as it has one proton in its nucleus.
Question 3: Photosynthesis in plants takes place in the:
- Mitochondria
- Nucleus
- Chloroplast (Correct answer)
- Ribosome
Correct answer: Chloroplast
Photosynthesis occurs in chloroplasts, which contain the green pigment chlorophyll.
Question 4: The boiling point of water at standard atmospheric pressure is:
- 90°C
- 95°C
- 100°C (Correct answer)
- 110°C
Correct answer: 100°C
Water boils at 100°C (212°F) at standard atmospheric pressure of 1 atm.
Question 5: Sound travels fastest through which medium?
- Air
- Water
- Vacuum
- Steel (Correct answer)
Correct answer: Steel
Sound travels fastest through solids like steel because the molecules are closely packed, enabling faster vibration transfer.
Question 6: The powerhouse of the cell is the:
- Nucleus
- Ribosome
- Mitochondria (Correct answer)
- Golgi Apparatus
Correct answer: Mitochondria
Mitochondria are called the powerhouse of the cell because they produce ATP (energy) through cellular respiration.
RRB NTPC General Science 2
Newton's First Law of Motion is also known as the Law of: