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

100 g alkaloid contains nitrogen= 17.28 g∴  162 g alkaloid will contain nitrogen = 17.28×162100 g                                                        27.9 g≃28 gAtomic weight of nitrogen = 14So, number of atoms of nitrogen present in one molecule of alkaloid = =2814=2