Question

or chemical
2.
Given below are a number of changes. Identify each of them as physical
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.​

Answer 1

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

Explanation:

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