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प्रश्न
While lighting a candle, Paheli observed the following changes.
- Wax was melting
- Candle was burning
- Size of the candle was reducing
- Melted wax was getting solidified.
Of the above, the changes that can be reversed are
विकल्प
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
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उत्तर
(i) and (iv)
Explanation:
Solid wax can be melted and melted wax gets solidifies again. Hence melting of wax and its solidification are reversible changes.
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संबंधित 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 |
Circle the odd one.
Circle the odd one.
Formation of curd from milk is
Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Changes which cannot be reversed are called ______.
Water on ______ changes to ice and on ______ comes back to water.
Differences between
reversible and irreversible changes are:
Touch me not plant: ______:: digestion of food: Irreversible change.
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
