Question

10. (a) What is a functional group in a carbon
compound? Identify the functional group present
in CH3COOH and C2H5OH.
(b) State the principle on which the cleansing
action of soap is based
CBSE 2008)​

Answer 1

Answer:

(a) An atom or group of atoms which makes an organic compound reactive and decides it's properties is called functional group.

CH3COOH has carboxylic Acid, and C2H5OH has Alcohol functional group.

(b) The cleansing action of soap is based on following principle.

• Soap dissolves in water to form soap micelles.

• Hydrophobic end of soap attracts dirt and grease. The hydrophillic end remains separated in water by the action of ion repulsion.

• Clothes are rinsed. These micelle are washed with water.

Hope the answer is what you would have expected!

Answer 2

Answer:

a group of atoms responsiblefor the characteristic reaction of a particular compound is called a functional group

carboxylic acid

alcohol

the cleansing action of soap is based on the following principle 1) soap dissolves in water to form soap micelles 2) hydrophobic end of soap attracts dirt and grease and the hydrophyllic end remains seperated in water by the action of ion repulsion