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Arrange the following in increasing orde...

Arrange the following in increasing order of their `pK_a` values.
(x) `CH_3-underset(O)underset(||)overset(O)overset(||)S-O-H` (y) `CH_3-overset(O)overset(||)C-O-H` (z) `CH_3-OH`

A

`y lt x lt z`

B

`x lt y lt z`

C

`y lt z lt x`

D

`x lt z lt y`

Text Solution

Verified by Experts

The correct Answer is:
B
Stability of resonance hybrid `prop` no . Of equivalent R.s
So stability order is
`Me-underset(3.eq.R.s)underset(O)underset(||)overset(O)overset(||)S-O^(Theta)gt underset(2.eq.R.S)overset(O)overset(||)(Me-C-O^(Theta))gtMe-O^(Theta)`
So Acidic strength order is `x gt y gt z` so `pK_a ` is `z gt y gt x`
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