Question

When hydrogen burns in oxygen, water is formed; when
electricity is passed through water, hydrogen and oxygen
are given out. Name the type of chemical changes involved
in the two cases.​

Answer 1

Answer:

In the first, the formation of water is a combination reaction.  

2H2+O2==>2H2O

The second is a decomposition reaction.  

2H2O==>H2+O2

Explanation:

Answer 2

Answer:

H2+2O2=2H20

This is combination reaction reaction

2H20=H2+2O2

This is Decomposition reaction

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