Ncert solutions

Ncert solutions

Grade 7

Physical and Chemical Changes | Exercise

Question 1

Q1) 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

Solution 1:

(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

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subject-cta

Question 1

Q1) 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

Solution 1:

(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

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your science exam ?

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Book a free class now
subject-cta
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