4.2 Functional Group and Homologous Series

Multiple Choice

Why is understanding functional groups and homologous series important in organic chemistry?

• Because they help classify compounds and predict their properties

• Because they are only found in inorganic compounds

• Because they are unrelated to chemical reactions

• Because they do not affect physical properties

Fill in the Blanks

The functional group present in alcohols is

.

Multiple Choice

Which of the following organic compounds contains a carbon–carbon double bond as its functional group?

• Alkane

• Alkene

• Alkyne

• Aromatic

Multiple Choice

Classify the compound based on the functional group present.

• aldehyde
• ketone
• carboxylic acid
• ester

Multiple Choice

Which of the following pairs correctly matches the homologous series with its functional group?

• Amide – Cyano group

• Nitrile – Amino

• Acyl chloride – Acyl halide

• Anhydride – Carboxamide

Multiple Select

Which of the following statements about homologous series are correct?

• Members have the same functional group.

• Physical properties change gradually with increasing carbon atoms.

• Successive members differ by a -CH2- group.

• All members have the same molecular formula.

Multiple Choice

Which phase do alkanes with 5 to 17 carbon atoms exist in?

• Gas phase

• Liquid phase

• Solid phase

• Plasma phase

Fill in the Blanks

The general formula for alcohols in a homologous series is

.

Open Ended

Identify the functional group in the following molecules:

a) (CH₃)₃CCH₂CH=CH₂ b) (CH₃)₃CCH=CHCH₂-OH

Draw

Circle and name the functional groups in the following compound:

Draw

Circle and name the functional groups in the following compound: