Question

Give example of gem-dihalide

Answer 1

I have examples with explanation-

Gem dihalides have halogens attached to the same carbon atom. For e.g.- CH3-CH2-CHCl2. 1,1- dichloropropane 
On the other hand vicinal dihalides have halogens attached to the adjacent carbon atoms. For e.g.- CH3-CHCl-CH2Cl. 1,2-dichloropropane. These are structural isomers

Answer 2

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Geminal dihalides are those dihalides in which the same halogen atom is present on the same carbon atom. For example: Geminal dihalides are also known as geminal dihalides.