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The Ellingham diagram for a number of me...

The Ellingham diagram for a number of metallic sulphides is reproduced below.

Answer the questions given below :
(ii) Which occurs to minimum extent in nature ?

A

`HgS`

B

`H_(2) S`

C

`Bi_(2) S_(3)`

D

`CS_(2)`

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The correct Answer is:
A, C
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