Question

1. Classify the changes involved in the following processes as physical or
chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d)Melting of wax
(e) Beating aluminium to make aluminium foil
(f) Digestion of food​

Answer 1

Answer:

(a) Photosynthesis - Chemical change

(b) Dissolving sugar in water - Physical change

(c) Burning of coal - Chemical change

(d) Melting of wax - Physical change

(e) Beating aluminium to make aluminium foil - Physical change

(f ) Digestion of food - Physical change

Answer 2

$\huge \bf \: Answer :$

_____________________________

1. Classify the changes involved in the following processes as physical or chemical changes :

(a) Photosynthesis

• Chemical change

(b) Dissolving sugar in water

• Physical change

(c) Burning of coal

• Chemical change

(d) Melting of wax

• Physical change

(e) Beating aluminium to make aluminium foil

• Physical change

(f) Digestion of food

• Chemical change

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Know more :

Chemical changes :-

• A change in the composition and chemical properties of a substance is called as a chemical change..

Examples of chemical changes :-

• Baking a cake
• Rusting of an iron
• Burning of wick

Physical changes :-

• A change in the physical properties of a substance is known as a physical change.

Examples of physical changes :-

• Folding a paper
• Melting of ice
• Cutting of vegetables

Difference between physical and chemical changes :

Physical changes :-

• Not formed
• Reversible
• Temporary change

Chemical changes :-

• Formed
• Irreversible
• Permanent change