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JEE Main 202127 AugustEvening Shift

Exam: JEE Main
Year: 2021
Date: 27 August
Shift: Evening Shift
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

JEE Main 2021 · 27 August · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

100g of propane is completely reacted with 1000g of oxygen. The...

100g

of propane is completely reacted with

1000g

of oxygen. The mole fraction of carbon dioxide in the resulting mixture is

x \times {10}^{- 2}

. The value of

x

is (Nearest integer)

Correct answer

0

Step-by-step solution

${C}_{3}{H}_{8 ( g )} + 5{O}_{2 ( g )} ⟶ 3{CO}_{2 ( g )} + 4{H}_{2}{O}_{( ℓ )}$

$\begin{cases}t = 0 & 2 . 27mole & 31 . 25mol\end{cases}$

$\begin{cases}t = \infty & 0 & 19 . 9mol & 6 . 81mol & 9 . 08mol\end{cases}$

mole fraction of ${CO}_{2}$ in the final reaction mixture (heterogeneous)

${X}_{{CO}_{2}} = \dfrac{6 . 81}{19 . 9 + 6 . 81 + 9 . 08}$

$= 0 . 1902 = 19 . 02 \times {10}^{- 2} ⇒ 19$

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