Statement I: Mercury thermometer can measure higher temperature as its boiling point is high.
Statement II: Alcohol thermometer can measure low temperatures because it's per degree expansion is less.

Statement I is correct but statement II is incorrect.

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Statement II is correct but statement I is incorrect.

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Both statements are correct.

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Both statements are incorrect.

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Solution

The correct option is A Statement I is correct but statement II is incorrect.

Mercury is liquid at room temperature and its boiling point is quite high. Its high boiling point gives us the advantage of measuring high temperatures.
Alcohol has a lower boiling point and it evaporates at high temperatures. Also it's expansion is not uniform like mercury at high temperature.
It can measure low temperatures more accurately because its per degree expansion is more than mercury.
Hence, statement I is correct but statement II is incorrect.

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Question 4

Boojho has three thermometers as shown in Figure. He wants to measure the temperature of his body and that of boiling water. Which thermometer(s) should he choose?

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Statement I: Mercury thermometer can measure higher temperature as its boiling point is high. Statement II: Alcohol thermometer can measure low temperatures because it's per degree expansion is less.

Statement I: Mercury thermometer can measure higher temperature as its boiling point is high.
Statement II: Alcohol thermometer can measure low temperatures because it's per degree expansion is less.