Qualitative Analysis - Result Question 43

####46. From the solution containing copper (+2) and zinc (+2) ions, copper can be selectively precipitated using sodium sulphide.

(1987, 1M)

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Answer:

Correct Answer: 46. $CrO _2 Cl _2$

Solution:

  1. $ZnS$ is soluble in dil. $HCl$ but $CuS$ does not dissolve in dil. $HCl$.


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