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Question

10mL N2 and 25mL H2 at same P and T are allowed to react to give NH3 quantitatively. Predict (i) the column of NH3 formed, (ii) limiting reagent.

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Solution

At same P and T, volume α no. of moles.
N2+3H22NH3
By stichiometry, nN2nH2=13(i)
As per given values, nN2nH2=1025=12.5(ii)
13<12.5
nN2nH2(ii)>nN2nH2(i)
H2 is a limiting reagent.
H2 reacted= 25mL
NH3 formed= 2×253mL
=16.67mL

Answer :- (i) The column of NH3 formed is 16.67mL
(ii) H2 is a limiting reagent.

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