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JEE Main 2026 Chemistry question

ChemistryHydrocarbonsJEE Main 2026

An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl₂/hν, (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is .

Answer: 4

Solution

CₙH₂ₙ₊₂ needs (3n+1)/2 mol O₂; setting this equal to 8 gives n=5. Only 2,2-dimethylpropane

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Question ID VK-015631