LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
119 views
in Chemistry by (34.6k points)
closed by

Alkanes constitute a homologous series of straight chain saturated hydrocarbons. Write down the structural formulae of the first five homologues of this series. Write their molecular formulae and deduce the general formula of such homologous series.

1 Answer

+1 vote
by (34.8k points)
selected by
 
Best answer

The first five homologues are generated by adding one – CH2 – at a time, starting with the first homologue, methane (CH4).

By counting carbon and hydrogen atoms in the five homologues, we get their molecular formulae as CH4 , C2 H6 , C3 H8 , C4 H10 and C5 H12 . Comparing these molecular formulae and assigning the number of carbon atoms as ‘n’, the following general formula is deduced: Cn H2n + 2

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...