NEET Physics Question - Thermal Physics

Assertion (A): Water is considered unsuitable for use in thermometers.

Reason (R): Thermal Expansion of water is non-uniform.

(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Assertion (A) is true. Water exhibits anomalous expansion between \(0^{\circ}\text{C}\) and \(4^{\circ}\text{C}\), making it unreliable for linear temperature scales. Reason (R) is true.

The non-uniform thermal expansion of water (especially its contraction then expansion) is why it's unsuitable for thermometers. (R) is the correct explanation for (A).

Rankers Physics

Water as Thermometer Liquid

Solution:

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