JEE Main 2022ChemistrySome Basic Concepts of ChemistryEasyNumerical

JEE Main 2022 — Some Basic Concepts of Chemistry Question with Solution

JEE Main 2022 (26 Jun Shift 2)

Question

The moles of methane required to produce 81 g of water after complete combustion is____×10-2 mol. [nearest integer]

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Show full solutionCorrect answer: 225
Correct answer
225

Step-by-step explanation

CH4+2O2⟶CO2+2H2O

POAC on H atom

nCH4×4=nH2O×2

nCH4=8118×2×14=8136

nCH4=2.25

=225×10-2

Hence, the number of moles of methane is 225×10-2

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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.