JEE Main 2022 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2022 (Online) 25th July Evening Shift
Question
A sample of 4.5 mg of an unknown monohydric alcohol, R-OH was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be 3.1 mL. The molecular weight of the unknown alcohol is __________ g/mol. [Nearest integer]
Enter your answer
Show full solutionCorrect answer: 4.5
Step-by-step explanation
moles of alcohol moles of
At STP, [Assuming STP]
1 mole corresponds to
Hence,
So, moles of alcohol
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Some Basic Concepts Of Chemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2022, 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.