1.

The ratio of amounts of H_(2)S needed to precipitate all the metal ions from 100 ml of 1 M AgNO_(3) and 100 ml of 1 M CuSO_(4) will be

Answer»

`1:2`
`2:1`
Zero
Infinity

Solution :In ACIDIC medium 2 MOLECULES of `KMnO_(4)` gives 5 ATOMS of OXYGEN
`2KMnO_(4)+3H_(2)SO_(4) to K_(2)SO_(4)+2MnSO_(4)+3H_(2)O+5(O)`
`2xx158=(316xx8)/(80)=31.6`
So, equivalent wt. of `KMnO_(4)` in acidic medium is `=31.6`gm


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