Answer: (3) silicon
Explanation:
Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Silicon (Si)
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: ethane , propanone
and water
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.