JEE Main 2023 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2023 (Online) 25th January Evening Shift
Question
Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is __________
(Given : Molar mass of A = 84 g mol)
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Show full solutionCorrect answer: 12
Correct answer
12
Step-by-step explanation
Molar mass of a hydrocarbon
Mass of carbon in of
Mass of hydrogen in of
Number of -atoms in a molecule of .
Mass of carbon in of
Mass of hydrogen in of
Number of -atoms in a molecule of .
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This is a previous-year question from JEE Main 2023, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.