Question

1. Classify the following as
chemical or physical changes:
.cutting of trees,
• melting of butter in a pan,
• rusting of almirah,
boiling of water to form steam,
passing of electric current,
through water and the water
breaking down into hydrogen
and oxygen gases,
dissolving common salt in
water,
• making a fruit salad with raw
fruits, and
• burning of paper and wood.
​

Answer 1

Answer:

cutting of trees, chemical change

• melting of butter in a pan, physical change

• rusting of almirah, chemical changes

boiling of water to form steam, physical change

passing of electric current,

through water and the water

through water and the waterbreaking down into hydrogen

through water and the waterbreaking down into hydrogenand oxygen gases,

through water and the waterbreaking down into hydrogenand oxygen gases,dissolving common salt in. physical change

water,

water,• making a fruit salad with raw physical change

fruits, and

fruits, and• burning of paper and wood. chemical change

know the difference between physical and chemical change

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut