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Q)

# $4NH_3+5O_2\rightarrow6H_2O+4NO$ <br> When one mole ammonia and one mole oxygen taken :

( A ) Oxygen is completely consumed
( B ) No one is correct
( C ) Ammonia is completely consumed
( D ) Both (a) and (b) are correct

$4NH_3+5O_2\rightarrow6H_2O+4NO$
$\therefore$ 1 mole of $NH_3$ requires 1.25 mole of Oxygen
So when 1 mole of ammonia and 1 mole of oxygen are combined 0.8 moles of ammonia will combine with 1 mole of oxygen and whole of $O_2$ will be consumed