Which Of The Following Processes Involve Chemical Reactions?
A. A storing of oxygen gas under pressure in a gas cylinder.
B. Liquefaction of air.
C. Keeping petrol in china dish in an open.
D. Heating copper wire in the absence of air at high temperature
Answer:D
Which Of The Following Processes Involve Chemical Reactions?
A. A storing of oxygen gas under pressure in a gas cylinder. B. Liquefaction of air. C. Keeping petrol in china dish in an open. D. Heating copper wire in the absence of air at high temperature