Basic strength of `CH-=overset(Theta)C(l), CH_(2)=overset(Theta) CH(II) and CH_(3)overset(Theta)CH_(2)(III)` will be in order

Options

A. `I lt II lt III`
B. `II lt III lt I`
C. `III lt II lt I`
D. `III lt I lt =II`

Answer

A

Explanation

`underset(sp)underset(uarr)CH-=CH" " underset(sp^(2)) underset(uarr)(CH_(2))" " underset(sp^(3)) underset(uarr)(CH_(3))-CH_(3)`
Electronegative of carbon `sp gt sp^(2) gt sp^(3)`
Acidic `CH-= CH gt HC_(2) =CH_(2) gt CH_(3) -CH_(3)`
Basic `CH underset((II))-=C^(Theta) lt CH_(2) underset((II)) (-=)CH^(Theta) lt CH_(3)underset((III)) (-)CH_(2)^(Theta)`