CBSE Class 10 Science 2017 · Paper 531/2 · Question 7
What is a functional group in carbon compounds ? Write the structural formula and the functional group present in
- (i)propanol and
- (ii)chloropropane.
Answer
A functional group is an atom or group of atoms that gives a compound its characteristic properties; propanol has and chloropropane has .
A functional group is an atom or a group of atoms (a heteroatom such as oxygen, nitrogen, sulphur or a halogen, or a group containing it) that replaces a hydrogen atom in a hydrocarbon chain and gives the compound its characteristic chemical properties, whatever the length and nature of the carbon chain.
(i) Propanol: ; functional group: the alcohol (hydroxyl) group, .
(ii) Chloropropane: ; functional group: the halo (chloro) group, .
(The full structural formulas, with every bond drawn, are in the figure.)
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