Question

Which of the following statements is not correct?

• A. A) Steam produces more severe burns on the skin than the boiling water.
• B. B) Water at room temperature is a liquid.
• C. C) Ice at $273\mathrm{K}$ causes less cooling than water at the same temperature.
• D. D) We can sip hot tea from a saucer faster than from a cup.

Answer 1

The correct option is C

C) Ice at $273\mathrm{K}$ causes less cooling than water at the same temperature.

Explanation for correct answer:

C) Ice at $273\mathrm{K}$ causes less cooling than water at the same temperature.

Water has more heat than ice in form of latent heat. Hence, Ice has more cooling effect than water at the same temperature (273K).

Explanation for incorrect answers:

A) Steam produces more severe burns on the skin than the boiling water.

This is because when water gets converted into steam at 100° C, it absorbs latent heat of vaporization.

B) Water at room temperature is a liquid.

Water at room temperature is a liquid because its freezing point is 0 °C and boiling point is 100 °C.

D) We can sip hot tea from a saucer faster than from a cup.

Since the surface area is more when hot tea is in the saucer as compared to that when it is in the cup, the rate of evaporation is faster in a saucer. Therefore, we can sip hot tea faster from a saucer than from a cup.

Hence, the correct option is C) because only this statement is wrong.