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प्रश्न
Match the following.
| Bud to flower | Dr. A.P.J. Abdul Kalam |
| Reversible change | Recyclable waste |
| India 2020 | Organic waste |
| Paper | Melting of ice |
| Vegetables | Irreversible change |
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उत्तर
| Bud to flower | Irreversible change |
| Reversible change | Melting of ice |
| India 2020 | Dr. A.P.J. Abdul Kalam |
| Paper | Recyclable waste |
| Vegetables | Organic waste |
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संबंधित प्रश्न
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 |
Formation of curd from milk is
When ‘Touch me not’ plant is touched by us, ______ changes occur.
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
The blackening of the Silver anklet is a (an) ______.
Which of the following change cannot be reversed?
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.
Give one example of change which occurs on heating but cannot be reversed.
Give one example of change occurs on mixing two substances, but can be reversed.
