Question

Molecular mass (in u) of a member of a particular homologous series is 56. Which of
the following cannot be the molecular mass of a member of this series ?
(A) 28 (B) 42 (C) 114 (D) 140

Answer 1

c) 114 because in an homologous series the molecular mass difference is 14 amu so if we check then we get it. CHEERS