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Q.

When taken in an Eudiometer tube operating at room temperature and pressure and subjected to complete reaction, in which of the following options, the contraction in volume is greater than or equal to 30% of original volume. [Note: Produced $H_{2} O$ is in liquid state]

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a

$C O (g)$ and $O_{2} (g)$ taken in a molar ratio of 2:1.

b

10mL of $C H_{4} (g)$ and 30mL of $O_{2} (g)$

c

$N_{2} (g)$ and $H_{2} (g)$ taken in a molar ratio of 3:1.

d

$N_{2}$ and $H_{2}$ taken in a molar ratio of 1:3

answer is A, B, D.

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Detailed Solution

(a)	$\begin{array}{l} 2 C O + O_{2} \to 2 C O_{2} \\ 2 x x \\ O O 2 x \end{array}$
(b)	$\begin{array}{l} C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O (l) \\ 10 m l 30 m l \\ O 10 m l 10 m l 20 m l \end{array}$
(c)	$\begin{array}{l} N_{2} + 3 H_{2} \to 2 N H_{3} \\ 3 x x 0 \\ (3 x - \frac{x}{3}) 0 \frac{2}{3} x \end{array}$
(d)	$\begin{array}{l} N_{2} + 3 H_{2} \to 2 N H_{3} \\ x 3 x \\ 0 0 2 x \end{array}$

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When taken in an Eudiometer tube operating at room temperature and pressure and subjected to complete reaction, in which of the following options, the contraction in volume is greater than or equal to 30% of original volume. [Note: Produced H2O is in liquid state]