A 2L solution was prepared by mixing of...

A 2L solution was prepared by mixing of `NH_(3)` and `(NH_(4))_(2)SO_(4)` . If pH of solution was found 8 and solution contains one mole of `NH_(3)` then moles of `(NH_(4))_(2)SO_(4)` was taken will be
[pKb of `NH_(3)=5]`
2
4
5
1

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