28 mg of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absored in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. Then the percentage of 'N' is the compound is

28 mg of an organic compound containing nitrogen was digested accordin

1.	28 mg of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absored in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. Then the percentage of 'N' is the compound is
Answer» 50 30 25 40 Solution :Excess ACID `= 15xx0.1xx1` m. eq. Acid taken initially `= 20xx0.1xx1` m.eq. Acid used for neutralisation `=(20xx0.1xx1)-(15xx0.1xx1)=0.5` m. eq. `% N =(NH_(3)" liberated"xx1.4)/("wt.of ORG. COMPOUND")=(0.5xx1.4)/(0.028)=25%`.