Home › Tamil Nadu SSLC (Class 10) › Chemistry › Types of Chemical Reactions › The reaction H2 + Cl2 giving 2HCl, where two rea…
The reaction H2 + Cl2 giving 2HCl, where two reactants join to form a single compound, is classified as which type of reaction?
ACombination reaction
BDecomposition reaction
CSingle displacement reaction
DDouble displacement reaction
Answer & Solution
Correct answer: A. Combination reaction
1. In the reaction, hydrogen gas and chlorine gas join to form a single product, hydrogen chloride.
2. A reaction in which two or more reactants combine to form one compound is a combination reaction.
3. Decomposition would be the opposite, a single compound splitting apart, so that is ruled out.
4. Therefore this is a combination reaction.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 10 Types of Chemical Reactions "Combination reactions", p.146_
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