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Copper II Chloride

The reagents ...

Question

The reagent(s) that can selectively precipitate $S^{2 -}$ from a mixture of $S^{2 -}$ and $S O_{4}^{2 -}$ in aqueous solution is/are:

A

C u C l_{2}

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B

B a C l_{2}

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C

P b (O O C C H_{3})_{2}

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D

N a_{2} [F e (C N)_{5} N O]

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Solution

The correct option is A $C u C l_{2}$
The reagent that can selectively precipitate $S^{2 -}$ and $S O_{4}^{2 -}$ in aqueous solution is $C u C l_{2}$

$S^{2 -} + C u C l_{2} \to C u S ↓ + 2 C l^{-}$

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Similar questions

Q. The reagent(s) that can selectively precipitate

S^{2 -}

from a mixture of

S^{2 -}

{S O}_{4}^{2 -}

in aqueous solution is (are) :

Q. The reagent(s) that can selectively precipitate

S^{2 -}

from a mixture of

S^{2 -}

S O_{4}^{2 -}

in aqueous solution is/are:

Q. An aqueous solution of Mohr's salt can give a precipitate with

N a O H

{N H}_{4} O H

. But, the aqueous solution of potassium ferrocyanide cannot give a precipitate with both reagents. How do you account for this?

Q. If true enter 1, else enter 0.
The gas liberated on heating a mixture of two salts with

N a O H

, gives a reddish brown precipitate with an alkaline solution of

K_{2} {H g I}_{4}

. The aqueous solution of the mixture on treatment with

{B a C l}_{2}

gives a white precipitate which is sparingly soluble in conc.

H C l

. On heating the mixture with

K_{2} {C r}_{2} O_{7}

H_{2} {S O}_{4}

, red vapours (A) are produced. The aqueous solution of the mixture gives a deep blue colouration (B) with potassium ferricyanide solution. The radicals in the given mixture are

F e^{2 +}, N H_{4}^{+}; S O_{4}^{2 +}, C l^{-}

C r O_{2} C l_{2}

An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reactionn with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme given below:
SCHEME:

Reagent S is

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Copper II Chloride

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