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14 March, 21:54

Which process is spontaneous?

A. Electrolysis of water into oxygen and hydrogen

B. Spreading of a strong fragrance of perfume in a room

C. Separation of sodium and chlorine from sodium chloride

D. Removal of iron filings from a mixture by using a magnet

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Answers (1)
  1. 15 March, 00:24
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    Only b, the spreading of gas molecules (fragrance) throughout a room, is spontaneous. The others requires some kind of intervention in order to make them occur.
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