Question

In kjeldahl’s method of estimation of nitrogen, nitrogen is quantitatively converted to ammonium sulphate it is then treated with standard solution of alkali the nitrogen which is present is estimated as.

• A. $N_{2}$ gas
• B. $NO_{2}$ gas
• C. $NH_{3}$ gas
• D. $(NH_{4})_{2}SO_{4}$ppt.

Answer 1

Answer: (C)

$NH_{3}$ gas

Answer 2

: When treated with standard dolution of alkali nitrogen is liberated as $NH_{3}$ which is abdorbed in $H_{2}SO_{4}$ to get percentage of nitrogen.