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JEE Main levelSingle correct optionDifficulty 2 of 3mc062

Propane burns as $C X_{3} H X_{8} + 5 O X_{2} 3 CO X_{2} + 4 H X_{2} O$ . If air supplies oxygen $25%$ in excess of the stoichiometric requirement, how many moles of $O X_{2}$ are supplied per mole of propane?

A $5.25$
B $4$
C $6.25$
D $18.75$

Answer: C

Stoichiometric

O X_{2}

= 5 mol per mol propane. A 25% excess means 5 x (1 + 0.25) = 6.25 mol supplied.

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