Question

Based on the data, which of the following conclusions can be made about the use of mercury and alcohol thermometers? a
An alcohol thermometer can measure the freezing point of a liquid that freezes at −80 °C.

b
An alcohol thermometer can measure a wider range of temperatures in a laboratory.

c
An alcohol thermometer is more reliable to measure the temperature of a liquid in a beaker that is 80 °C.

d
An alcohol thermometer is better to measure the boiling points of colorless liquids.

Answer 1

Answer:

option c will becorrect

Answer 2

Final answer: Correct option, (a) an alcohol thermometer can measure the freezing point of a liquid that freezes at −80 °C.

Given that: We are given conclusions can be made about the use of mercury and alcohol thermometers.

To find: We have to find which one is correct.

Explanation:

• A thermometer is used to measuring the temperature.
• A thermometer contain a thermometric substance which having a particular physical property that changes with temperature.
• For all liquid-in-glass thermometers, height of the thermometric substance (liquid) that changes with change in temperature.
• There are two kinds of liquid-in-glass thermometers. Mercury-in-glass thermometer and alcohol-in-glass thermometer are the two type of liquid-in-glass thermometers.
• Correct option (a) an alcohol thermometer can measure the freezing point of a liquid that freezes at −80 °C.

Alcohol-in-glass thermometer is used for measuring very low temperatures up to as -115 °C. So an alcohol thermometer can efficiently measure -80 °C.

Hence, option (a) an alcohol thermometer can measure the freezing point of a liquid that freezes at −80 °C is right.

• Option (b) an alcohol thermometer can measure a wider range of temperatures in a laboratory is wrong.

Alcohol-in-glass thermometer is used for measuring very low temperatures.

The temperature range is falls between -112 °C  to 78 °C.

The liquid-in-glass thermometer is used for measuring  wider range of temperatures in a laboratory.

Hence, option (b) is wrong.

• Option (c) an alcohol thermometer is more reliable to measure the temperature of a liquid in a beaker that is 80 °C is wrong.

Temperature range of an alcohol thermometer is falls between -112 °C  to 78 °C. So option (c) is wrong.

• Option (d) an alcohol thermometer is better to measure the boiling points of colourless liquids is also wrong.

An alcohol thermometer measure the boiling point of a colourless liquid which boils at 100 °C but mercury thermometer easily measures the boiling point of a colourless liquid which boils at 82 °C.

Hence, option (d) is also wrong.

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