Q 2172180036.     What is the minimum pH required to prevent the precipitation of ZnS in a solution i.e. 0.01 M `ZnCl_2` and saturated with 0.1 M `H_2S`?

`K_(sp(ZnS)) = 10^-21 ; K_(a_2(H_2S)) = 10^-20`

JEE Mock Mains 06/05
A

4

B

1

C

3

D

2

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