Question

Write the molecular formula of the second and third member of the homologous series with the first member is ethyne..10ncert

Answer 1

Ethyne contains 2 Carbons. As parent contains 2 carbons, its 2nd homologue will be of 3 carbon , 3rd homologue will be of 4 and so on

i.e, n =2,3,4,5....