A Write the formula of the functional group present in carboxylic acids- b Name the functional group present in CH3-C- CH- c Name the functional groups present in the following compounds - i CH3-CHO ii CH3-CH2-COOH iii CH3-O-C-CH3 iv CH3-CH2-CH2-OH

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Classification of Functional Groups

a Write the f...

Question

(a) Write the formula of the functional group present in carboxylic acids.
(b) Name the functional group present in $C H_{3} - C \equiv C H .$
(c) Name the functional groups present in the following compounds :
(i) $C H_{3} - C H O$ (ii) $C H_{3} - C H_{2} - C O O H$ (iii) $C H_{3} - O | | C - C H_{3}$ (iv) $C H_{3} - C H_{2} - C H_{2} - O H$

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Solution

(a) The formula of the functional group present in carboxylic acids is R-COOH (where R is an alkyl group)

(b) The functional group present in $C H_{3} - C \equiv C H$ is the alkyne group (triple bond).

(c)
(i) The functional group present in $C H_{3} - C H O$ is the formyl group (-CHO).

(ii) The functional group present in $C H_{3} - C H_{2} - C O O H$ is the group of carboxylic acids (-COOH).

(iii) The functional group present in $C H_{3} - O | | C - C H_{3}$ is the carbonyl group (-CO-).

(iv) The functional group present in $C H_{3} - C H_{2} - C H_{2} - O H$ is the alcohol (hydroxyl) group (-OH).

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Similar questions

Q. Name the functional groups present in the following compounds.
(i)

{C H}_{2} - C O - C H_{2} - {C H}_{2} - {C H}_{2} - {C H}_{3}

(ii)

{C H}_{3} - C H_{2} - {C H}_{2} - C O O H

(iii)

{C H}_{3} {- C H}_{2} - {C H}_{2} - {C H}_{2} - C H O

(iv)

{C H}_{3} - {C H}_{2} - O H

Name the functional groups present in the following compounds: [5 MARKS]

1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$
2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$
3. ${CH}_{3} - {CH}_{2} - CHO$
4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$
5. ${CH}_{3} - {CH}_{2} - CO-OH$

Q. Given below are some organic compounds containing certain functional group.
i.

C H_{3} - C O O H

ii.

C H_{3} - C H_{2} - C H_{2} - O H

iii.

C H_{3} C H_{2} - C H_{2} . N H_{2}

iv.

C H_{3} - C H O

(a) Write the names of functional group of any of the two compounds given above.
(b) Write the IUPAC name of

C H_{3} - C H_{2} - C H_{2} - O H

.
(c) Give the structural formula and IUPAC name of functional group isomer of

C H_{3} - C H_{2} - C H_{2} - O H

Q. Which functional group is present in the following compound:

C H_{3} - C H_{2} - C O O H

Q. Which functional group present in the compound shown below?

H - O ∥ C - C H_{2} - C H_{3}

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(a) Write the formula of the functional group present in carboxylic acids. (b) Name the functional group present in CH3−C≡CH. (c) Name the functional groups present in the following compounds : (i) CH3−CHO (ii) CH3−CH2−COOH (iii) CH3−O||C−CH3 (iv) CH3−CH2−CH2−OH