Expansion of Liquids

Q.

When a thermometer is brought in contact with a hot body, the liquid inside it_________.

1. expands

2. changes its colour

3. changes its mass

4. contracts

Q.

Mercury is used in thermometers to measure the temperature because:

1. It is the only metal that is liquid at room temperature.

2. It expands or contracts with temperature.

3. It changes state with change in temperature.

4. Mercury does not stick to glass walls.

Q. Which of the following is NOT a reason to avoid mercury thermometers?

1. 
   Mercury is difficult to dispose of.
2. 
   Mercury shows uniform expansion.
3. 
   Mercury impairs hearing and vision.
4. 
   Mercury deteriorates organs like the brain and kidney.