Question

"Combination reaction is the reverse of decomposition reaction"Justify this statement with the help of chemical equation for each.

Answer 1

Combination reaction is the one in which two or more elements combine to form one single compound under the action of physical factors.

For example:

2H2 + O2 ––––› 2H2O

Decomposition or Decombination reaction is the one in which a compound is broken to form it's constituents molecules or atoms or elements under the action of physical factors.

For example:

2H2O ---electrolysis-------› 2H2 + O2.

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