Question

Q3: Mercury and alcohol are usually used in liquid in glass thermometer.
(5)Suggest why these liquid instead of water are used?​

Answer 1

Answer:

Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids . ... This range is very small as compared to other liquids as mercury , having freezing point about −39oC and boiling point 356oC .

Answer 2

Explanation:

Mercury and alcohol are used instead of water in thermometer because

1) Mercury is a non-sticky fluid which prevents it from sticking in the glass

2) Water is colourless while Mercury and alcohol is shiny which helps to see the temperature