Match the following columns. Column I Column II (i) Ethanoic acid (a) H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - Br (ii) Bromopentane (b) CH 3 COOH (iii) Butanone (c) H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - CHO (iv) Hexanal (d) H 3 C - CH 2 - C = O - CH 3

(i) The IUPAC name of ethanoic acid indicates that the parent chain consists of two carbon atoms and hence the root word is 'eth'. The valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. A carboxylic acid functional group, - COOH is present in this compound, so the suffix used is 'oic acid'. Therefore, the condensed structure of ethanoic acid is CH 3 COOH . (ii) The IUPAC name bromopentane indicates that the parent chain consists of five carbon atoms and hence the root word is 'pent'. All the valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. Hetero atom bromine is present at the carbon as a substituent for hydrogen, so the prefix used is 'bromo'. Therefore, the condensed structure of bromopentane is H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - Br . (iii) The IUPAC name butanone or butan-2-one indicates that the parent chain consists of four carbon atoms and hence the root word is 'but'. All the valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. Ketone functional group is present at second carbon, so the suffix used is 'one' and the number 2 represents the position of the keto group. Therefore, the condensed structure of butanone is H 3 C - CH 2 - C = O - CH 3 . (iv) The IUPAC name hexanal indicates that the parent chain consists of six carbon atoms and hence the root word is 'hex'. All the valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. Aldehyde functional group, - CHO is present at the carbon atom, so the suffix used is 'al'. Therefore, the condensed structure of hexanal is H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - CHO . Column I Column II (i) Ethanoic acid (b) CH 3 COOH (ii) Bromopentane (a) H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - Br (iii) Butanone (d) H 3 C - CH 2 - C = O - CH 3 (iv) Hexanal (c ) H 3 C - CH 2 - CH 2 - CH 2 - CH 2 - CHO

E M B I B E

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 4

EASY

10th ICSE

IMPORTANT

Earn 100

Which of the following does not belong to the same homologous series?

81.25% studentsanswered this correctly

Important Questions on General Organic Chemistry

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 5

Which of the following is an aldehyde?

EASY

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 6

The correct structural formula of butanoic acid is

MEDIUM

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 7

Which of the following is the correct IUPAC name?

EASY

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 8

The pair of compounds representing isomers is

HARD

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 9 - General Organic Chemistry>CHAPTER EXERCISE>Q 9

Match the following columns.

Column I	Column II
(i) Ethanoic acid	(a) $H_{3} C - {CH}_{2} - {CH}_{2} - {CH}_{2} - {CH}_{2} - Br$
(ii) Bromopentane	(b) ${CH}_{3} COOH$
(iii) Butanone	(c) $H_{3} C - {CH}_{2} - {CH}_{2} - {CH}_{2} - {CH}_{2} - CHO$
(iv) Hexanal	(d) $H_{3} C - {CH}_{2} - (C = O) - {CH}_{3}$