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Question
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
Options
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
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Solution
(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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