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How many acidic group is present in give...

How many acidic group is present in given amino acid ?
`overset(o+)(N)H_(3)-underset(CO_(2)^(-))underset(|)(CH)-CH_(2)-CO_(2)H`

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The correct Answer is:
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Find iso-electric point of given amino acid CH_(3)-underset(o+)underset(NH_(3))underset(|)(CH)-CO_(2)H " " pK_(a) = 2.2

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Write the correct order of acidic strength of following compounds: (a)CH_(3) - CH_(2)-O-H" "(b)CH_(3)-underset(CH_(3))underset(|)CH- O - H (c)CH_(3) - underset(CH_(3))underset(|)overset(CH_(3))overset(|)C - O - H

The order of S_(N)1 reactivity in aqueous aceic acid solution for the compounds underset((1))(H_(3)C-overset(O)overset(||)(C)-CH_(2)-CI)" "underset((2))(H_(3)C-CH_(2)-CH_(2)-CI)" "underset((3))((H_(3)C)_(3)C-CI)

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