Exercises
1. Classify the changes involved in the following processes as physical or
chemical changes: wy gweg su least hullasons.
(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
2. State whether the following statements are true or false. In case
statement is false, write the corrected statement in your notebook.
(a) Cutting a log of wood into pieces is a chemical change. (True/False)
(b) Formation of manure from leaves is a physical change. (True/False
Answers
Answered by
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Answer:
1 .a-chemical change
.b-physical change
.c....
.d-physical change
.e....
.f-chemical change
2 .a-false.... correct : physical change
.b-false....correct: chemical change
Answered by
0
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 → Chemical change
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(a) False
Cutting a log of wood into pieces is a physical change.
(b) False
Formation of manure from leaves is a chemical change.
(c) True
(d) False
Iron and rust are different substances. Rust is iron oxide
(e) True
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