Question

An alkaloid contains 17.28 % of nitrogen and its molecular mass is 162. The number of nitrogen atoms present in one molecule of alkaloid is

• A. five
• B. four
• C. three
• D. two

Answer 1

Answer: (D)

two

Answer 2

Amount of nitrogen present in one mole of alkaloid i.e., in $162 \,g =\frac{162\times17.28}{100}$ $\therefore$ No. of nitrogen atoms per molecule $=\frac{162\times17.28}{100\times14}$ $=2$ (approx)