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प्रश्न
Salt can be separated from its solution (salt dissolved in water), because ______.
विकल्प
mixing of salt in water is a change that can be reversed by heating and melting of salt.
mixing of salt in water is a change that cannot be reversed.
mixing of salt in water is a permanent change.
mixing of salt in water is a change that can be reversed by evaporation.
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उत्तर
Salt can be separated from its solution (salt dissolved in water), because mixing of salt in water is a change that can be reversed by evaporation.
Explanation:
Salt can be separated from water solution by evaporating the water. Hence, mixing of salt in water is a reversible change.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of reversible changes.
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 |
Circle the odd one.
Circle the odd one.
When ‘Touch me not’ plant is touched by us, ______ changes occur.
The blackening of the Silver anklet is a (an) ______.
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?
Give one example of change which occurs on mixing two substances, but cannot be reversed.
A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.
Choose the odd one out. Give reason for your choice.
