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Cations are classified into varius group...

Cations are classified into varius group on the basis of their behaviour against some reagents .The group reagent used for the classifaction of most common cation are `HCI,H_(2)S,NH_(4)OH,(NH_(4))_(2)CO_(3)` Classification is based on whether a cation reacts with these reagents by the formation of precipitates or not .
An aqueous solution contain `Hg^(2+),Hg_(2)^(2+),Pb^(2+)`.THe addition of `2M HCI` will procipitate.

A

`HgCI_(2)`only

B

`PbCI_(2)"only"^(-)`

C

`PbCI_(2)` and `Hg_(3)CI_(2)`

D

`PbCI_(2)` and `CdCI_(2)`

Text Solution

Verified by Experts

The correct Answer is:
c
`2M MCI` is group reagent for reagent for group 1 cation `PbCI_(2)` And `HgCI_(2)` will get precipitated, is their solubility products `(K_(sp))` are less than that of other radical
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An aqueous solution Hg^(2+),Hg_(2)^(2+),Pb^(2+) and Cd^(2+) . The addition of 6N HCl will precipitate

For the purpose of systematic qualitative analysis, cations are classified into various groups on the basisof their behaviour against some reagents. The group reagents used for the classification of most common cations are hydrochloric acid, hydrogen sulphide, ammonium hydroxide, and ammonium carbonate. Classification id based on wheather a certain reacts with these reagents by the formation of precipitates or not. An aqueous solution contains Hg^(2+),Hg_2^(2+),Pb^(2+) and Cd^(2+) .The addition of 2 M HCl will precipitate :

Knowledge Check

  • Cations are classified into varius group on the basis of their behaviour against some reagents .The group reagent used for the classifaction of most common cation are HCI,H_(2)S,NH_(4)OH,(NH_(4))_(2)CO_(3) . Classification is based on whether a cation reacts with these reagents by the formation of precipitates or not . An aqucous solution which is sightly acids contains cattions Fe^(2+),Zn^(2+) and Cu^(2+) . THe rengent added in excess to this solution would identify the separate Fe^(2+) ion in one step is

    A
    `2M HCI`
    B
    `6M NH_(3)`
    C
    `6M NaOH`
    D
    `H_(2)S gas `

  • Cations are classified into varius group on the basis of their behaviour against some reagents .The group reagent used for the classifaction of most common cation are HCI,H_(2)S,NH_(4)OH,(NH_(4))_(2)CO_(3) . Classification is based on whether a cation reacts with these reagents by the formation of precipitates or not . Which one among the following paires of ions cannot be separated by H_(2)S in the presence of dilute hydrochloric acid ?

    A
    `Bi^(2+),Cd^(2+)`
    B
    `AI^(2+),Hg^(2+)`
    C
    `Zn^(3+),Cu^(2+)`
    D
    `Ni^(2+),Cu^(2+)`

  • An aqueous solution contains Hg^(2+),Hg_(2)^(2+),Pb^(2+) and Cd^(2+) . The addition of HCl (6N) will precipitate

    A
    `Hg_(2)Cl_(2)` only
    B
    `PbCl_(2)` only
    C
    `PbCl_(2)` and `Mg_(2)Cl_(2)`
    D
    `PbCl_(2) and HgCl_(2)`

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    For the purpose of systematic qualitative analysis, cations are classified into various groups on the basisof their behaviour against some reagents. The group reagents used for the classification of most common cations are hydrochloric acid, hydrogen sulphide, ammonium hydroxide, and ammonium carbonate. Classification id based on wheather a certain reacts with these reagents by the formation of precipitates or not. To avoid the precipitation of hydroxides of Ni^(2+),Co^(2+),Mn^(2+) along with those of the third group cations, the solutions should be :

    An aqueous solution containing Hg^(2+),Hg_(2)^(2+),Pb^(2+) and Cd^(2+) ions will give precipitate of _______ with dil. HCl

    Which one is correct group reagent for group cations?

    Which of these is the correct group reagent for group cations ?

    -NH_(2) group shows acidic nature while reacts with reagent.

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