question_answer

In Duma’s method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at \[300\text{ }K=15\text{ }mm\])  [AIPMT (S) 2011]

A) 16.45

B) 17.45

C) 14.45

D) 15.45

Correct Answer: A

Solution :

[a] Where, pressure of  at STP = 760 mm =Temperature of  at STP = 273 K ? Volume of  at STP (By gas equation) where, (pressure at which  collected).  aqueous tension of water = 15 mm  volume of moist nitrogen in nitro meter  % of nitrogen in given compound