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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
Circle the odd one.
What is reversible change?
Analogy
Curdling of milk : irreversible change :: Formation of clouds : ________change
Changes which cannot be reversed are called ______.
Evaporation of water is a reversible change.
Differences between
reversible and irreversible changes are:
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?
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Give one example of change which occurs on heating but can be reversed.
Circle the odd one out. Give a reason for your choice.
