Question

(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) CH3CHO
(ii) CH3CH2COOH
(iii) CH3COCH3
(iv) CH3CH2CH2OH

Answer 1

Answer:

a)formula of carboxylic acid is COOH

b)yne

(i). Aldehyde (al)

(ii). Carboxylic acid(oic acid)

(iii).ketone(one)

(iv).Alcohol(ol)

Answer 2

$CH_3CHO$ has an Aldehyde Group

Explanation:

a.) Name of Compound in $CH_3COOH$ is Acetic Acid or Ethanoic Acid.

Functional group - COOH

b.) There is No Functional Group in $CH_3$ – C ≡ CH , Nut there is presence of Methyl (-$CH_3$) Group.

c.) The functional groups present in -

i) $CH_3CHO$ - Aldehyde(-CHO)

IUPAC name - Ethanal

ii) $CH_3CH_2COOH$

Functional group = Carboxylic acid ( - COOH)

IUPAC name - Propanoic acid

iii) $CH_3COCH_3$

Functional group - Ketone ( -CO-)

IUPAC name - Propanone

iv) $CH_3CH_2CH_2OH$

Functional group - Alcohol (-OH)

IUPAC Name - Propanol