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Question

Given a reaction:

4NH3(g)+5O2(g)4NO(g)+6H2O(g)
When 1 mole of ammonia and 1 mole of O2 are made to react to completion :

A
1.0 mole of H2O is produced
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B
1.0 mole of NO will be produced
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C
all the oxygen will be consumed
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D
all the ammonia will be consumed
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Solution

The correct option is C all the oxygen will be consumed
4 moles of ammonia react with 5 moles of oxygen as per the balanced chemical equation. When 1 mole of ammonia is present, it will react with 1.25 moles of oxygen. However, only 1 mole of oxygen is present.

Hence, oxygen is the limiting reagent and is completely consumed during the reaction.

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