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Question

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

A

Thermometer (i) or (iii) for measuring body temperature and (ii) for measuring the temperature of boiling water.

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B

Thermometer (i) for measuring the temperature of both.

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C

Thermometer (ii) for measuring the temperature of both.

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D

Thermometer (iii) for measuring the temperature of both.

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Solution

The correct option is A

Thermometer (i) or (iii) for measuring body temperature and (ii) for measuring the temperature of boiling water.


  1. Clinical thermometer: A clinical thermometer is a medical thermometer used to check the temperature of humans and animals. Usually, a human body temperature fluctuates between 35°C to 42°C. So the clinical thermometers have a range of 35°C to 42°C.
  2. Laboratory thermometer: A laboratory thermometer checks the temperature of some substances used in the lab other than human body temperature. It ranges from -10°Cto110°C.
  3. (i) and (iii) are clinical thermometers used to measure body temperature.
  4. (ii) is a laboratory thermometer that is used for laboratory purposes, which is used to measure the temperature of boiling water.

Hence, the correct answer is option A.


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