JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 27 June 2022, Shift 2, Chemistry Q81

Question 81 of 90 in this shift, Chemistry question 21 of 30, Section B.

116 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 masses of H, O and C are 1, 16 and 12, respectively. The data agrees with how many formulae of the following ? ________. A.

\mathrm{CH_3COOH}

B. HCHO C.

\mathrm{CH_3OOCH_3}

\mathrm{CH_3CHO}

Official answer

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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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.