How many pairs out of following have equal number of lone pairs on central atom?
`XeF_(5)^(+," "SO_(2)Cl_(2)," "NH_(2)^(-)," "XeF_(4)`

Answer

1

Explanation

`{:(,"l.p."),(XeF_(5)^(+),1),(SO_(2)Cl_(2),0),(NH_(2)^(-),2),(XeF_(4),2):}`