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JEE Main 2013 Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main 2013

A gaseous hydrocarbon gives upon combustion 0.72 g. of water and 3.08 g. of CO₂. The empirical formula of the hydrocarbon is -

Answer: (2)

Solution

mol H₂O = 0.04 (0.08 mol H); mol CO₂ = 0.07 (0.07 mol C). Ratio C:H = 7:8, giving C₇H₈.

Question ID VK-000892