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When a single reactant breaks down into two or more products, the reaction is called:

ADecomposition reaction
BCombination reaction
CDisplacement reaction
DNeutralisation reaction
Answer & Solution
Correct answer: A. Decomposition reaction
1. AB → A + B is the general form. 2. CaCO₃ →(heat) CaO + CO₂ is a thermal decomposition. 3. Electrolysis of water and photodecomposition of AgCl are other examples. _Source: syllabus Science Ch 1 §1.2.2 Decomposition Reactions_
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