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H(2)S will precipitate the sulphide of a...

`H_(2)S` will precipitate the sulphide of all the metals from the solution of chlorides of `Cu,Zn` and Cd if:

A

the solution is aqueous

B

the solution is acidic

C

the solution is slightly acidic

D

solution is alkaline

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The correct Answer is:
A, D
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Consider the following statement: S_(1) : Cu^(2+) ions are reduced to Cu^(+) by potassium iodide and potassium cyanide both, when taken in excess S_(2) : H_(2)S will precipitate the sulphide of all the metals from the solutions of chlorides of Cu,Zn and Cd if the solution is aqueous. S_(3) :The presence of magnesium is confirmed in qualitative analysis by the formation of a white crystal S_(4) :Calomel on reaction with potassium iodide gives red precipitate. and arrange in the order of true/false.

Consider the following statements: Statement-1: Cu^(2+) ions are reduced to Cu^(+) by potassium iodide and potassium cyanide both, when taken in excess. Statement-2: H_(2)S will precipitate the sulphide of all the metals from the solution from the solutions of chlorides of Cu,Zn and Cd if the solution is aqueous. Statement-3: The presence of magnesium is confirmed in qualitative analysis by the formation of a white crystalline precipitate of MgNH_(4)PO_(4) . Statement-4: Calmol on reaction with potassium iodide gives red precipitate.

Arrange the following metals in the order in whiCHM they displace eaCHM other from the solution of their salts. Al, Cu, Fe, Mg, and Zn .

$ Sb(III) is not precipitated as sulphide when in its alkaline solution H_(2)S is passed. ! The concentration of S^(2+) ions in alkaline medium is inadequate for precipitation.

Statement-1:When H_(2)S gas is passed into an aqueous solution of ZnCl_(2),Zn^(2+) ions are completely precipitated as zinc sulphide. Statement-2 :Zinc sulphide is soluble in solutions of caustic alkali as well as in dilute HCl .

In the extraction of Cu from its sulphide ore, the metal is formed by reduction of Cu_(2)O with

GRB PUBLICATION-SALT ANALYSIS-Multiple Objective Type
  1. Concentrated aqueous ammonia dissolve(s) which of the following comple...

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  2. Hg(2)l(2)darr ("green") underset("with" H(2)O) overset("boiled") to pr...

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  3. H(2)S will precipitate the sulphide of all the metals from the solutio...

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  4. Which of the following statement(s) is /are false ?

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  5. Which of the following compound(s) is/are insoluble in excess aqueous ...

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  6. Ammonium molybdate test is used for the estimation of:

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  7. Which of the following statement(s) is/are true?

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  8. Which of the following is/are correct for potassium ferrocyanide?

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  9. CoCI(2)+KNO(2)+CH(3)COOH rarr [X] +H(2)O +KCU + CH(3)COOK +NO (Unbalan...

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  10. Consider the reactions shown below: which of the following state...

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  11. A solution of colourless salt H on boiling with excess NaOH produces a...

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  12. Which of the following statement(s) is/are correct with respect to bro...

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  13. Select the incorrect statement(s).

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  14. Original solution of salt or mixture should not be prepared in concent...

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  15. White precipitate of PbSO(4) gets dissolved in:

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  16. What final product(s) is/are formed in the following series of reactio...

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  17. Which of the following sulphides do not dissolve in 50% HNO(3) but dis...

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  18. Which of the following statement(s) is/are correct?

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  19. Which of the following can be used to regulate the concentration of OH...

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  20. Select the correct statement(s).

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