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Question

Which group is meta directing group ?

A
CCl3
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B
OH
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C
NH2
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D
CH3
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Solution

The correct option is A CCl3
CCl3 is the meta directing group because chlorine is more electronegative than carbon. It pulls the elctron density towards itself and act as a deactivating group on benzene ring which gives generally meta substituents.
OH,NH2 and CH3 increase the electron density on benzene ring. Hence these are activating group which gives ortho and para substituents.
Hence the correct option is a.

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