When hydrogen burns in oxygen water is formed and when water is electrolysed then hydrogen and oxygen are produced what type of reaction takes place in first and in the second case?
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118
1. oxidation
2. reduction
2. reduction
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55
The burning of hydrogen gas with oxygen gas to form water molecules is a combustion reaction as it is combustion of hydrogen in the presence of oxygen gas.
It can also called a combination reaction of hydrogen and oxygen gas. This reaction results in forming water. Whereas electrolysis of water to form hydrogen gas and oxygen gas is a decomposition reaction as here one molecule breaks to form more than one products.
Then it is referred to as decomposition reaction.
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