Question

Which of the following temperature can be measured using a mercury thermometer?

• A. $70°\mathrm{C}$
• B. $500°C$
• C. $–273°\mathrm{C}$
• D. All of these

Answer 1

The correct option is A

$70°\mathrm{C}$

1. Mercury thermometer is based on the principle of change of volume with the rise of temperature and can measure temperatures ranging from$-30°\mathrm{C}\mathrm{to}357°\mathrm{C}$.
2. Mercury can exist in a liquid state only $70°C$ from the given options.

Hence, the correct option is (a).