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Introduction to Organic Chemistry

The molecular...

Question

The molecular mass of any two homologues differ by?

A

14

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B

16

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C

12

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D

15

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Solution

The correct option is A
14

All homologues of a homologous series have the same general formula. For example, consider the example of alkanes with the general formula: $C_{n} H_{2 n + 2}$ . Hence the difference in the molecular weight between two consecutive homologues is $- C H_{2} - 3$ or 14 amu.

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Similar questions

Q. (a) Give the molecular formula of one homologue of each of the following:
(i) C₃H₆
(ii) C₂H₆
(iii) C₂H₂
(b) What is the difference in the molecular mass of any two adjacent homologues?
(c) By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?

Q. (a) What is homologous series?
(b) What is the difference in molecular formula of any two adjacent homologues in terms of types of atoms and molecular mass?

Q. The molecular mass of any two adjacent homologous differ by ________ amu.

Q. What is the difference between two consecutive homologues:

(i) in terms of molecular mass?
(ii) in terms of number and kind of atoms per molecule?

Q. Any two consecutive members in a homologous series differ in molecular mass by :

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