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Question
Choose the odd one out. Give reason for your choice.
Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene
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Solution
Inflating a balloon
Reason:
Inflating a balloon is a reversible change. The other three are irreversible changes.
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RELATED QUESTIONS
Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?
| Change | Can be reversed |
| (i) Raw egg to boiled egg | Yes/No |
| (ii) Batter to idli | |
| (iii) Wet clothes to dirty clothes | |
| (iv) Woollen yarn to knitted sweater | |
| (v) Grain to its flour | |
| (vi) Cold milk to hot milk | |
| (vii) straight string to a cold string | |
| (viii) Bud to flower | |
| (ix) Milk to paneer | |
| (x) Cow dung to biogas | |
| (xi) stretched rubber band to its normal size | |
| (xii) Melting of ice-cream |
Short Answer Type Question:
What happens when sugar is heated?
Drying of wet clothes in air is an example of
Formation of curd from milk is
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Give examples to explain the difference between changes that can or cannot be reversed.
Evaporation of water is a reversible change.
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
Give one example of change occurs on mixing two substances, but can be reversed.
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
