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Question

In the reaction, 4NH3+5O24NO+6H2O, when one mole of ammonia and one mole of oxygen are allowed to react till completion, which of the following statements is true?
  1. 1.5 mole of NO is formed
  2. All the ammonia is consumed
  3. 1.0 mole of H2O is produced
  4. All the oxygen is consumed


Solution

The correct option is D All the oxygen is consumed
Calculation of limiting reactant
For Ammonia=given molesstoichiometric coefficient=14=0.25 mol 
For Oxygen=given molesstoichiometric coefficient=15=0.20 mol
So, Oxygen is the limiting reagent. Hence, it will be totally consumed
As per stoichiometry,
5 mol of oxygen forms 4 mol of NO 
1 mol will form = 45 = 0.8 mol of NO
Similarly,
5 mol of oxygen forms 6 mol of H2O
1 mol will form 65×1=1.2 mol of H2O

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