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Wave Equation

Which of the ...

Question

Which of the following pairs can be separated by $H_{2} S$ in $d i l . H C l$ ?

A

C u^{2 +}

and

C d^{2 +}

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B

C u^{2 +}

and

N i^{2 +}

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C

C u^{2 +}

and

Z n^{2 +}

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D

H g^{2 +}

and

A l^{3 +}

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Solution

The correct options are
B $C u^{2 +}$ and $N i^{2 +}$
C $C u^{2 +}$ and $Z n^{2 +}$
D $H g^{2 +}$ and $A l^{3 +}$
Option (B),(C),(D) are correct.
(A): Both $C u^{2 +}$ and $C d^{2 +}$ are precipitated in II group by $H_{2} S$ in $d i l . H C l$ .

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