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.
• B. Thermometer (i) for measuring the temperature of both.
• C. Thermometer (ii) for measuring the temperature of both.
• D. Thermometer (iii) for measuring the temperature of both.

Answer 1

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 $35°\mathrm{C}$ to $42°\mathrm{C}$. So the clinical thermometers have a range of $35°\mathrm{C}$ to $42°\mathrm{C}$.
2. Laboratory thermometer: A laboratory thermometer checks the temperature of some substances used in the lab other than human body temperature. It ranges from $-10°\mathrm{C}\mathrm{to}110°\mathrm{C}$.
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.