Which of the following involve chemical reaction and why:-
(a) storing of oxygen gas under high pressure in a gs 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
Answers
Answered by
0
Answer:
A is the best answer ot thi question
Answered by
2
Answer:
The correct answer is option d)
Explanation:
Oxygen can be converted back to liquid again if it is realeased
Air can be again converted to gas
The ignition temperature of petrol is above 200 degrees so it won’t evaporate
Heating copper will form copper oxide which is a chemical change
So the answer is option D)
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