V. 2. Given below are a number of changes. Identify each of them as physical or chemical change.
a) When a whisked egg is heated, it scrambles.
b) When a candle is lit, the wax melts.
c) When a piece of coal is burnt, it turns to ash.
d) When jelly cubes are heated, they melt.
e) When wood is kept in contact with water for a long time, it rots.
f) When the sun shines on a puddle of water, the water evaporates.
Answers
Answered by
0
Answer:
Change
Can be reversed
(i) Raw egg to boiled egg
No
(ii) Batter to idli
No
(iii) Wet clothes to dry clothes
No
(iv) Woolen yarn to knitted sweater
Yes
(v) Grain to its flour
No
(vi) Cold milk to hot milk
Yes
(vii) Straight string to a coiled string
Yes
(viii) Bud to flower
No
(ix) Milk to paneer
No
(x) Cow dung to biogas
No
(xi) Stretched rubber band to its normal size
Yes
(xii) Melting of ice-cream
Yes
Answered by
1
Answer: (a) chemical change
(b) physical change
(c) chemical change
(d) chemical change
(e) physical change
(f) physical change
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