1.

The concentration of which ion is to be decreased, when NH_(3) solution is added

Answer»

`OH^(-)`
`NH_(4)^(+)`
`H_(3)O^(+)`
`O_(2)^(-)`

SOLUTION :Because `NH_(3)` acts as LEWIS acid any they give electron pair to `H_(3)O^(+)` ION. `H_(3)O^(+)` is a Lewis BASE. Which accept the electron pair from `NH_(3)`.


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