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Which of the following pairs of cations ...

Which of the following pairs of cations cannot be separated by using an `NH_(3)` solution?

A

`Pb^(+2),Zn^(+2)`

B

`Zn^(+2),Cu^(+2)`

C

`Pb^(+2),Cu^(+2)`

D

`Al^(+3),As^(3+)`

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NARAYNA-QUALITATIVE ANALYSIS-LEVEL -I (C.W.)
  1. The ion which is not precipitated by H2 S in the presence of HCl is

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  2. Na(2)CO(3)+KNO(3) to No reaction

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  3. Ca, Ba and Sr ions are precipitated in fifth group as their -

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  4. When H(2)S is passed through an ammonical salt solution X, a white pr...

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  5. In third group, bromine water is used to test

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  6. In the reaction : H(2)ShArr2H^(+)+S^(2-), when NH(4)OH is added, then

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  7. An aq. Solution containing Hg^(2+),Pb^(2+) and Cd^(2+) ions is mixed w...

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  8. Disodium hydrogen phosphate is used to test

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  9. Which of the following statement is // are true ?

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  10. The metal ion which is precipitated when H(2)S is passed with HCl is

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  11. The group reagent for group V radicals is

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  12. Aqua regia is

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  13. Which of the following will be precipitated when dil. HCl is added to ...

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  14. H(2)S in the presence of HCl precipitates II group but not IV group be...

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  15. A black sulphide is formed by the action of H(2)S on

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  16. The ion which can be precipitated with both HCl and H(2)S separately i...

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  17. Which of the following pairs of cations cannot be separated by using a...

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  18. Which of the following is insolublein yellow ammonium polysulphide?

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  19. The ion which is not precipitated by H2 S in the presence of HCl is

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  20. Which of the following pairs of cations cannot be separated by adding ...

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