Which of the following changes given below are desirable/undesirable and reversible/irreversible ?
A. Rotting of fruits
B. Cooking of food
C. Melting of ice cream.
D. Cutting of vegetables.
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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
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