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Q.

Acetylene, $C_{2} H_{2}$ , reacts with oxygen according to the unbalanced equation:
$C_{2} H_{2} (g) + O_{2} (g) ⟶ {CO}_{2} (g) + H_{2} O (g)$
What is the $O_{2} / C_{2} H_{2}$ ratio when this equation is correctly balanced?

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a

$\frac{2}{1}$

b

$\frac{5}{2}$

c

$\frac{3}{1}$

d

$\frac{4}{1}$

answer is D.

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Detailed Solution

Complete reaction is given as,
Here, the ratio,

$O_{2} / C_{2} H_{2} = 5 / 2$

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