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JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 5 April 2024, Shift 1, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

An organic compound has 42.1% carbon, 6.4% hydrogen and remainder is oxygen. If its molecular weight is 342, then its molecular formula is :

(1) $\mathrm{C_{12}H_{22}O_{11}}$ Official answer
(2) $\mathrm{C_{11}H_{18}O_{12}}$
(3) $\mathrm{C_{14}H_{20}O_{10}}$
(4) $\mathrm{C_{12}H_{20}O_{12}}$

Official answer

Option 1

NTA final key.

Chapter: Some Basic Concepts of Chemistry
Topic: Mole Concept
Idea tested: Molecular Formula Determination

Same idea in other shifts

Asked 2× in all

12 Apr 2023, Shift 1 · Q61A metal chloride contains 55.0% of chlorine by weight . 100 mL vapours of the metal chloride at STP weigh 0.57 g. The molecular formula of…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.