H_2S gas is passed through an acidified solut | vedclass

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(C) In an acidified solution,$H_2S$ provides a low concentration of $S^{2-}$ ions due to the common ion effect of $H^+$.$Ag^+$ and $Cu^{2+}$ belong to

Vedclass · Accepted Answer

$Cu^{2+}$

Vedclass · Answer

(C) In an acidified solution,$H_2S$ provides a low concentration of $S^{2-}$ ions due to the common ion effect of $H^+$.$Ag^+$ and $Cu^{2+}$ belong to Group $II$ of the qualitative analysis scheme,which precipitate as sulfides in acidic medium.$Zn^{2+}$ belongs to Group $III$ (or $IV$ depending on the scheme) and requires a basic medium to precipitate as $ZnS$.Therefore,both $Ag^+$ and $Cu^{2+}$ will form precipitates ($Ag_2S$ and $CuS$).Since the question asks which forms a precipitate and both $Ag$ and $Cu$ are options,the most accurate answer in a multiple-choice context where only one is selected is often $Cu^{2+}$ or $Ag^+$. Given the options,$Cu^{2+}$ is a classic example of Group $II$ precipitation.

List-$I$ (Ion involved)	List-$II$ (Agent)
$(i) \, Ni^{2+}$	$(A).$ Sodium thiosulphate
$(ii) \, Ag^{+}$	$(B).$ Sodium nitroprusside
$(iii) \, Cu^{2+}$	$(C).$ Ammonia
$(iv) \, S^{2-}$	$(D).$ Dimethylglyoxime

List-$I$ (Ion)	List-$II$ (Group Number in Cation Analysis)
$A. Co^{2+}$	$I. Group-I$
$B. Mg^{2+}$	$II. Group-III$
$C. Pb^{2+}$	$III. Group-IV$
$D. Al^{3+}$	$IV. Group-VI$

$H_2S$ gas is passed through an acidified solution containing $Ag^+$,$Cu^{2+}$,and $Zn^{2+}$ ions. Which of these will form a precipitate?

Similar Questions

Match List-$I$ with List-$II$ and select the correct answer using the codes given below.

List-$I$ (Ion involved) List-$II$ (Agent)

$(i) \, Ni^{2+}$ $(A).$ Sodium thiosulphate

$(ii) \, Ag^{+}$ $(B).$ Sodium nitroprusside

$(iii) \, Cu^{2+}$ $(C).$ Ammonia

$(iv) \, S^{2-}$ $(D).$ Dimethylglyoxime

Which sulphide is soluble in $(NH_4)_2CO_3$?

Match List-$I$ with List-$II$:

List-$I$ (Ion) List-$II$ (Group Number in Cation Analysis)

$A. Co^{2+}$ $I. Group-I$

$B. Mg^{2+}$ $II. Group-III$

$C. Pb^{2+}$ $III. Group-IV$

$D. Al^{3+}$ $IV. Group-VI$

Choose the correct answer from the options given below:

Which ion is detected using Nessler's reagent?

$Pb(CH_3COO)_2$ gives a precipitate of which color with $H_2S$?

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