Answer:
The correct answer is option D.
Explanation:
Step 1: 
Step 2: 
Overall reaction can be determined by adding all the reactions of mechanism:

Reactants in an overall reaction = 
Products in an overall reaction = 
According to question , the role of oxygen gas is product.
Answer:
A
Explanation:
3 CARBON ATOMS 8 HYDROGEN
Answer:
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Bronze metal is harder and more malleable than copper. It is also conducts property of ductility, so it can be easily shaped as a statue.