The correct order of decreasing polarity is

Options

A. `HF gt SO_(2) gt H_(2)O gt NH_(3)`
B. `HF gt H_(2)O gt SO_(2) gt NF_(3)`
C. `HF gt NH_(3) gt SO_(2) gt H_(2)O`
D. `H_(2) O gt NH_(3) gt SO_(2) gt HF `

Answer

b

Explanation

EN difference in HF = 4 - 2.1 = 1.9,
in ` SO_(2) = 3.5 - 2.5 = 1.0, " in" H_(2)O = 3.5 - 2.1 = 1.4`,
in `NH_(3) = 3.0 - 2.1 = 0.9`
As the EN difference decreases , the percentage ionic
character decreases accordingly . Thus , the correct order is :
` HG gt H_(2)O gt SO_(2) gt NH_(3)`