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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 12 April 2023, Shift 1, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

A 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 the metal chloride is (Given: Atomic mass of chlorine is 35.5u)
  1. (1)MCl\mathrm{MCl}
  2. (2)MCl2\mathrm{MCl_2}Official answer
  3. (3)MCl3\mathrm{MCl_3}
  4. (4)MCl4\mathrm{MCl_4}

Official answer

Option 2

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
  1. 5 Apr 2024, Shift 1 · Q73An organic compound has 42.1% carbon, 6.4% hydrogen and remainder is oxygen. If its molecular weight is 342, then its molecular formula is :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.