The arrangement of molecules differs in different states of matter.
Some solids like salt and sugar dissolve in water
. When one liquid dissolves in another
both are said to be miscible. Gases like oxygen and ammonia dissolve in water.
| Heating or cooling brings about changes in matter. Some changes are temporary whil
others are permanent.
Let us answer
A. Tick () the correct answer,
1. Which of the following is a physical change?
a. melting of butter
b. rusting of iron
e. burning of paper
d. changing of wheat to bread
SOLIDS, LIQUIDS AND GASES
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