JEE Main 2019ChemistrySome Basic Concepts of ChemistryHardMCQ

JEE Main 2019 — Some Basic Concepts of Chemistry Question with Solution

JEE Main 2019 (10 Apr Shift 1)

Question

At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL  of O2 for complete combustion, and 40 mL of CO2 is formed. The formula of the hydrocarbon is:

Choose an option

Show full solutionCorrect option: C
Correct answer
CC4H6

Step-by-step explanation

Let hydrocarbon is CxHy

10x=40 ; x=4 and 10x+y4=55
x+y4=5510
x+y4=5.5
Put the value of x
4+y4=5.5
y4=5.5-4
y4=1.5 then y=6
Hence hydrocarbon is C4H6

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About this question

This is a previous-year question from JEE Main 2019, 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.