JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 2, Chemistry Q61

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

120 g of an organic compound that contains only carbon and hydrogen gives 330 g of CO

_2

and 270 g of water on complete combustion. The percentage of carbon and hydrogen, respectively are

(1)25 and 75
(2)40 and 60
(3)60 and 40
(4)75 and 25Official answer

Official answer

Option 4

NTA final key.

Chapter: Some Basic Concepts of Chemistry
Topic: Mole Concept
Idea tested: Empirical Formula from Mass Percentage

Same idea in other shifts

Asked 6× in all

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27 Jun 2022, Shift 2 · Q81116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60 g of oxygen and 48.5 g of carbon. Given that the atomic…MediumNumerical value
28 Jun 2022, Shift 2 · Q61Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given : Atomic masses of C, H…MediumSingle correct
2 Sep 2020, Shift 2 · Q50The ratio of the mass percentages of ‘C & H’ and ‘C & O’ of a saturated acyclic organic compound ‘X’ are 4 : 1 and 3 : 4 respectively.…HardNumerical value

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.