Question

Which one of the following process involves chemical reaction :-

(a) Liquefaction of air

(b) Storing of oxygen gas under pressure in gas

(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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Answer 1

Answer:

d. Heating copper wire in presence of air at high temperature

Hope you got the answer:)

Answer 2

Answer:

a) liquefaction of air

b) storing of oxygen gas under pressure in gas

c) keeping petrol in a china dish in the open

d) heating copper wire in presence of air at high temperature