1.

The decreasing order of size of ions is :-

Answer»

`Br^(-) GT S^(-2) gt CL^(-) gt N^(-3)`
`N^(3-) gt S^(-2) gt Cl^(-) gt Br^(-)`
`Br^(-) gt Cl^(-) gt S^(-2) gt N^(-3)`
`N^(-3) gt Cl^(-) gt S^(-2) gt Br^(-)`

ANSWER :A


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