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How many groups show - I effect? CH3,ove...

How many groups show - I effect? `CH_3,overset(o+)NH_3,-OH,O^(Theta) , -N(CH_3)_2, - SO_3H,` `- CHO, - Cl,- COO^(Theta)`

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The correct Answer is:
5
`-NH_3,overset(o+)-OH, -SO_3H, -CHO - Cl`
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