For the complete combustion of 4 litre ethane, how much oxygen is required?

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14 litre

4 litre

8 litre

12 litre

answer is A.

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Detailed Solution

The reaction for this takes place as,

$C_{2} H_{6} + \frac{7}{2} O_{2} \to 2 {CO}_{2} + 3 H_{2} O$

In this 1 litre of ethane needs 3.5 litres oxygen for complete combustion of this compound.
So, 4 litres of ethane needs total oxygen complete combustion
= 4 X 3.5
= 14 liters

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