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True or false statements : (i) Sodium ...

True or false statements :
(i) Sodium cyanide is used as a depresent to separate lead sulphide from zinc sulphide.

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The correct Answer is:
1
`ZnS` dissolves in `NaCN` to form the soluble complex.
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फेन प्लवन विधि में जिंक सल्फाइड और लेड सल्फाइड को पृथक किया जा सकता है

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