Multiple choice

Which one of the following is not a correct reason behind the use of mercury in thermometers?

  1. It doesnot expands uniformly

  2. It is opaque and shining

  3. It is good conductor of heat

  4. It does not stick to glass
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury expands uniformly with temperature changes, which is essential for accurate temperature measurement. This uniform expansion is a key reason mercury is used in thermometers. The other options are actual advantages: mercury is opaque and visible (B), conducts heat well (C), and doesn't stick to glass (D). The question asks which is NOT a correct reason, and since mercury DOES expand uniformly, option A is the correct answer.

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