Question

decomposition reactions form:
a simpler compounds from a complex compound
b complex compounds from simpler compounds
c a single product
d none of the above

Explanation:

Decomposition reactions involve a single reactant breaking down into simpler substances. For example, \( \text{CaCO}_3 \xrightarrow{\text{heat}} \text{CaO}+\text{CO}_2\). Here, a complex compound (\(\text{CaCO}_3\)) decomposes into simpler compounds (\(\text{CaO}\) and \(\text{CO}_2\)). Option b is for synthesis reactions (e.g., \(2\text{H}_2 + \text{O}_2
ightarrow 2\text{H}_2\text{O}\)), option c is incorrect as decomposition reactions have multiple products (except in some rare cases like \(2\text{O}_3
ightarrow 3\text{O}_2\), but generally), and option d is wrong since option a is correct.

Answer:

A. Simpler compounds from a complex compound