JEE Main 2018ChemistrySome Basic Concepts of ChemistryMediumMCQ

JEE Main 2018 — Some Basic Concepts of Chemistry Question with Solution

JEE Main 2018 (16 Apr Online)

Question

An unknown chlorohydrocarbon has 3.55 % of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine atoms present in 1 g of chlorohydrocarbon are :(Atomic wt. of Cl=35.5 u; Avogadro constant =6.023×1023 mol–1)

Choose an option

Show full solutionCorrect option: D
Correct answer
D6.023 ×1020

Step-by-step explanation

CxHyCl

% Cl=3.55

Weight of Cl=1 ×3.55100

nCl-=1 ×3.55100 ×35.5

No. of Cl-ion= 1 × 3.55100 ×35.5×6.023 ×1023= 6.023 ×1020

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About this question

This is a previous-year question from JEE Main 2018, 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.