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Chief ore of Zn is ZnS. The ore is conce...

Chief ore of `Zn` is `ZnS`. The ore is concentrated by froth flotation process and then heated in air to convert `ZnS` to `ZnO`. ltntgt `2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2)`…(i)
`ZnO`, thus formed is treated with dilute `H_(2) SO_(4)`.
`ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O` ....(ii)
On electrolysis of `ZnSO_(4(aq)), Zn` metal is produced.
`2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2)`....(iii)
`ZnO` on dissolution in `NaOH` gives

A

`Na_(2) ZnO_(2)`

B

`NaZnO_(2)`

C

`NaZn(OH)_(4)`

D

`NaZn_(2) O_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
`ZnO + 2NaOH rarr Na_(2) ZnO_(2) + H_(2) O`.
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