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Passing H(2)S gas into a mixture of Mn^(...

Passing `H_(2)S` gas into a mixture of `Mn^(2+), Ni^(2+), Cu^(2+)` and `Hg^(2+)` ions in an acidified aqueous solution precipitates

A

CuS and HgS

B

MnS and CuS

C

MnS and NiS

D

NiS and HgS

Text Solution

Verified by Experts

The correct Answer is:
A
`Cu^(+2)` and `Hg^(+2)` are II group basic radicals with `H_(2)S` in presence of acid (dil. HCl)
CuS(black),HgS(black)ppt are obtain
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NARAYNA-QUALITATIVE ANALYSIS-Level -II (H.W.)
  1. Which one among the following pairs of ions cannot be separated by H(2...

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  2. In the separation of Cu^(2+) and Cd^(2+) of Iind group in qualitative ...

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  3. Which of the following sulphate is insoluble in water ?

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  4. Passing H(2)S gas into a mixture of Mn^(2+), Ni^(2+), Cu^(2+) and Hg^(...

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  5. An aqueous solution of a substance gives a white precipitate on treat...

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  6. When H(2)S gas is passed through an ammonical salt solution X, a sligh...

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  7. MgSO(4) on reaction with NH(4)OH and Na(2)HPO(4) forms a white crystal...

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  8. When dimethyl glyoxime solution is added to an aqueous solution of nic...

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  9. Aqueous solution of A gives yellow precipitate with aqueous solution o...

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  10. The sulphides of which one of the following groups of elements are sol...

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  11. NiS is separated from ZnS by treating with

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  12. Mercurous chloride black on adding NH(4)OH to it. Explain.

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  13. Which of the following sulphides is yellow in colour?

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  14. An orange precipitate in the second group is given by

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  15. An aqueous solution containing Hg^(2+),Hg(2)^(2+),Pb^(2+) and Cd^(2+) ...

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  16. Upon treatment with ammonical H(2)s, the metal ion that precipitates a...

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  17. Calomel (Hg(2)Cl(2)) on reaction with ammonium hydroxide gives

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  18. A sulphate of a metal (A) on heating evolves two gases (B) and ( C) an...

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  19. Which of the following pairs is not distinguished by passing H(2)S ?

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  20. A red solid is insoluble in water. However, it becomes soluble if some...

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