For the following acids
`underset((I))((CH_(3))_(3)C CH_(2)CO_(2)H) " " underset((II))((CH_(3))_(3)overset(o+)(N)CH_(2)CO_(2)H) " " underset((III))(CH_(3)COOH)`
`pK_(a)` value will be in order

Arrange the following carbocations in order of increasing stability : {:(underset("(I)")((CH_(3))_(3)Coverset(+)CH_(2))", "underset("(II)")((CH_(3))_(3)overset(+)C)","),(underset("(III)")(CH_(3)CH_(2)overset(+)CH_(2))", "underset("(IV)")(CH_(3)overset(+)CHCH_(2)CH_(3))):}

What is the correct order of decreasing stability of the following cations? underset(I)(CH_(3)-overset(+)(C)H-CH_(3))" "underset(II)(CH_(3)-overset(+)(C)H-OCH_(3)) underset(III)(CH_(3)-overset(+)(C)H-CH_(2)-OCH_(3))

What si the correct order of decreasing stability of the following carbocations. underset(I.)(CH_(3)-overset(o+)(C)H-CH_(3))" "underset(II.)(CH_(3)-overset(o+)(C)H-OCH_(3)) underset(III.)(CH_(3)-overset(o+)(C)H-CH_(2)-OCH_(3))