Multiple choice

A student is doing some experiments in the chemistry lab. He goes to take the temperature of a liquid, which is boiling in a beaker. While doing so, he checks the temperature of the boiling liquid by dipping a lab thermometer into it. Why does he not take the thermometer out of the liquid before reading the temperature?

  1. The level of mercury begins to fall as soon as the lab thermometer is taken out.

  2. The level of mercury rises when it is taken out.

  3. He does it by mistake.

  4. The method helps him to get the reading of desired temperature.

  5. This is done as it is not a solid.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The level of mercury begins to fall as soon as the lab thermometer is taken out as the air around has lesser temperature.

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