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A reaction in which two or more reactants combine to form a single product is called:
ACombination reaction
BDecomposition reaction
CDisplacement reaction
DDouble displacement
Answer & Solution
Correct answer: A. Combination reaction
1. Combination: A + B → AB (one product).
2. Example: CaO + H₂O → Ca(OH)₂ (slaking of lime).
3. Decomposition is the reverse (AB → A + B).
_Source: NCERT Class 10 Science Ch 1 §1.2 Types of Chemical Reactions_
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