Physics · Thermal Properties of Matter
Read the following statements carefully and choose the correct option. Assertion (A): Mercury is used in liquid-in-glass thermometers. Reasoning 1 (R1): Mercury is a good conductor of heat. Reasoning 2 (R2): Mercury expands uniformly over a wide range of temperatures.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1R1 is the key reason that explains assertion A, as high thermal conductivity prevents heat loss.
- 2R2 is the key reason that explains assertion A, as uniform expansion enables a linear temperature scale.✓
- 3Both R1 and R2 are incorrect statements.
- 4Both R1 and R2 are correct statements, but R1 is the primary explanation for why mercury is chosen over other liquids.
Correct answer
R2 is the key reason that explains assertion A, as uniform expansion enables a linear temperature scale.
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