The basic strength of
`underset(I)(CH-=C), underset(II)(CH_(2)=CH), underset(III)(CH_(3)CH_(2)^(-))`
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

Weak base - strong bearing negative charge conjugate acid
`underset("weakest base")(CH-=C^(-))rarr underset("strongest acid")(CH-=CH)`
`underset("stronger base")(CH_(3)-CH_(2)^(-)) underset("weakest acid")(CH_(3)CH_(3))`