Which one of the following processes involve chemical reactions?
(a) Storing of oxygen gas under pressure in a gas cylinder
(b) Liquefaction of air
(c) Keeping petrol in a china dish in the open
(d) Heating copper wire in presence of air at high temperature

NCERT Class X
Science - Exemplar Problems

Chapter_Chemical Reactions And Equations

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Answers

2015-05-29T14:36:15+05:30
The answer to this question is option c because when petrol is kept in a china dish and in open it will evaporate and this process cannot be reversed thus has a property of chemical reaction
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