Question

Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
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Answer 1

Answer:

. In decomposition reaction one single reactant decomposes or breakdown to make two or more products , whereas in combination reaction two or more reactants form a single product. And so decomposition reaction is opposite of combination reaction.

Explanation:

A+B = AB (combination reaction)

AB= A+B

I have not copied it because I have written this answer in my note book and the chapter name is chemical reaction and equation.

Answer 2

- DECOMPOSITION reactions are opposite of COMBINATION reactions as in decomposition a salt is broke down into two or more substances while in Combination two or more substances make a salt .

DECOMPOSITION : AB - A + B

COMBINATION : A + B - AB