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Question

(a) What is an alkyl group?
(b) Give the name of any three alkyl radicals. How are they formed? [3 MARKS]

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Solution

a) 1 Mark
b) 2 Marks

(a) Alkyl group: An alkyl group or alkyl radical is obtained by removing one atom of hydrogen from an alkane molecule. An alkyl group is named by changing the suffix -ane of the alkane with the suffix -yl. The alkyl group has unpaired electron which is indicated by a line.

(b) Name of simple alkyl radicals:
NameMolecularformulaCondunsedformulaMethylCH3CH3MethylEhylC2H5CH2CH3EthylPropylC3H7CH2CH2CH3nPropyland|CH3CHCH3Isopropy
Alkyl radical or group is formed by the removal of one hydrogen atom from the corresponding alkane.
CnH2n+2(Alkane)HCnH2n+1(Alkyl radical)

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