JEE Main 2026 Chemistry question
One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is .
Answer: 17
Solution
CₙH₂ₙ₊₂ + (3n+1)/2 O₂ → ...: (3n + 1)/2 = 8 ⇒ n = 5 (pentane, C₅H₁₂). Sum = 5 + 12 = 17.