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Question 41

Given below are two statements: Statement I : Gallium is used in the manufacturing of thermometers. Statement II : A thermometer containing gallium is useful for measuring the freezing point of brine solution (256 K). In the light of the above statements, choose the correct answer from the options given below :

Statement I: Gallium has a wide liquid range (m.p. 29.76°C, b.p. 2204°C), making it useful for high-temperature thermometers. True.

Statement II: Gallium melts at ~303 K (29.76°C), so it would be solid below this temperature. A Ga thermometer cannot measure 256 K since Ga is solid there. False.

The correct answer is Option (4): Statement I is true but Statement II is false.

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