JEE Main 2020ChemistrySome Basic Concepts of ChemistryEasyNumerical

JEE Main 2020 — Some Basic Concepts of Chemistry Question with Solution

JEE Main 2020 (03 Sep Shift 2)

Question

0.023×1022 molecules are present in 10gof a substance x''. The molarity of a solution containing 5g of substance 'x' in 2 L solution is _________×10−3
 

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Show full solutionCorrect answer: 25
Correct answer
25

Step-by-step explanation

Number of mole ofX=6.022×10226.022×1023=10Molar mass of x

So molar mass of x=100g

Molarity =5100×2=0.025 M

Ans. 0.025 M

M=25×10-3

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About this question

This is a previous-year question from JEE Main 2020, 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.