Question

At low temperatures, __________ of thermometer can be used.

• A. mercury thermometer type
• B. alcohol thermometer type
• C. water thermometer type
• D. no type

Answer 1

The correct option is B alcohol thermometer type

Alcohol expands uniformly. It has a low freezing point ($-115°C$), therefore it is very suitable for the place where the temperature gets very low. It is an easy available cheap liquid, which is safe to use. Alcohol is cheaper than mercury, and there is no toxic release when it is broken.