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`

Options

A. `y lt x lt z`
B. `x lt y lt z`
C. `y lt z lt x`
D. `x lt z lt y`

Answer

B

Explanation

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`