20 ml of a gaseous compound containing nitrogen and hydrogen only, is passed through a series of electric spark, by which the volume becomes 40 ml . When the resulting gases are passed through water,

Question

20 ml of a gaseous compound containing nitrogen and hydrogen only, is passed through a series of electric spark, by which the volume becomes 40 ml . When the resulting gases are passed through water, the volume becomes 30 ml . Now, 50 ml oxygen gas is mixed in the resulting gases and fired. If the final volume becomes 50 ml , the correct information(s) is/are (All the volumes are measured at the same temperature and pressure). N 2 ​ and H 2 ​ gases are completely insoluble in water)

TestHub · Accepted Answer

20 ml N x ​ H y ​ ​ ⟶ 40 ml N 2 ​ ​ + x H 2 ​ ​ + 30 ml N x ​ H y ​ ​ Water ​ N x H y ​ ​ + 50 ml N 2 ​ ​ + 30 + O 2 ​ ​ 50 ml Volume of N x ​ H y ​ left undecomposed = 40 − 30 = 10 ml ∴ Volume of N x ​ H y ​ left decomposed = 20 − 10 = 10 ml (50% decomposition) 10 ml N x ​ H y ​ ​ ⟶ 5 x ml 2 X ​ N 2 ​ ​ + 5 yml 2 x ​ H 2 ​ ​ 5 x + 5 y = 30 ⇒ x + y = 6 2 H 2 ​ + O 2 ​ ⟶ 2 H 2 ​ O 5 yml 2 5 y ​ ml O Contraction in volume : 2 15 y ​ = 30 ⇒ y = 4 , x = 2 ∴ Compound = N 2 ​ H 4 ​

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