alleryWhich of these reactions is a substitution reaction?
ACH4 + Cl2 -> CH3Cl + HCl (in sunlight)
BC2H4 + H2 -> C2H6 (with Ni)
CCH3OH + Na -> CH3ONa + 1/2 H2
DCH3COOH + NaOH -> CH3COONa + H2O
Answer & Solution
Correct answer: A. CH4 + Cl2 -> CH3Cl + HCl (in sunlight)
1. Substitution means one atom in a molecule is replaced by another.
2. In CH4 + Cl2 -> CH3Cl + HCl, a hydrogen atom is replaced by chlorine.
3. Option B is addition across a double bond.
4. Option C is a metal-acid type reaction; option D is acid-base neutralisation.
5. So option A is the substitution reaction.
_Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_
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