Q.5. Which one of the given processes involves chemical reactions ? (a) Storing of oxygen gas under pressure in a gas cylinder (b) Keeping petrol in a China dish in open (c) Liquefaction of dir (d) Heating copper wire in the presence of air at high temperature
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Heatingcopper wire in the presence of air at high temperature
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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
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