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1 mole of an ...

Question

1 mole of an aliphatic compound $C_{3} H_{8}$ is completely burnt in an excess of $O_{2}$ . The reacted moles of oxygen are:

A

5 mol

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B

2 mol

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C

3 mol

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D

8 mol

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Solution

The correct option is A $5 mol$
Balancing the combustion reaction:
$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
1 mol of $C_{3} H_{8}$ will react with 5 mol of oxygen.

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