The boiling point of water on absolute scale (Kelvin) is MCQ with Answer and Explanation

The boiling point of water on absolute scale (Kelvin) is
A. 212 K
B. 373 K
C. 100 K
D. 273 K
Answer: Option B
Solution (By JKExamLibrary)
100°C = 373.15 K ≈ 373 K.

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Practice More Physics Questions

Question #1
The unit of latent heat is
A. J/°C
B. J
C. J/kg
D. W

Correct Answer: Option C


Explanation:
Latent heat per unit mass, so Q = mL, L = Q/m, unit J/kg (or cal/g). Specific latent heat of fusion/vaporization. Heat required for phase change without temperature change.

This question belongs to: Science Physics
Question #2
Which of the following statements is true regarding uniform circular motion?
A. Kinetic energy changes continuously
B. Speed is constant
C. Velocity is constant
D. Acceleration is zero

Correct Answer: Option B


Explanation:
In uniform circular motion, speed remains constant but direction changes, so velocity (vector) changes. There is centripetal acceleration towards centre, so acceleration is not zero. Kinetic energy = ½mv², depends on speed, so remains constant. Thus, only speed is constant.

This question belongs to: Science Physics
Question #3
Which of the following is a renewable source of energy?
A. Nuclear fuel
B. Solar energy
C. Coal
D. Petroleum

Correct Answer: Option B


Explanation:
Solar, wind, hydro, biomass renewable. Coal, oil, natural gas fossil fuels, non-renewable. Nuclear fuel uranium finite. Renewable replenish naturally.

This question belongs to: Science Physics