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JEE Main 202224 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
24 June
Shift
Evening Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2022 · 24 June · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

120g of an organic compound which contains only carbon and hydrogen...

120g120g of an organic compound which contains only carbon and hydrogen on complete combustion gives 330g330g of CO2{CO}_{2} and 270g270g of water. The percentage of carbon and hydrogen in the organic compound are respectively

Options

  1. A2525 and 7575
  2. B4040 and 6060
  3. C6060 and 4040
  4. D7575 and 2525

Correct answer

D. 7575 and 2525

Step-by-step solution

Weight of the organic compound, W=120g,

Weight of carbondioxide (x)( x )=330g

Weight of water (y)( y )=270g

Percentageofcarbon = \dfrac{12}{44}X\dfrac{x}{W}X100 = \dfrac{12}{44}X\dfrac{330}{120}X100 = 75 % PercentageofHydrogen = \dfrac{2}{18}X\dfrac{y}{W}X100 = \dfrac{2}{18}X\dfrac{270}{120}X100 = 25 %

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