InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The total number of following ions, which interfere with the brown ring test for `NO_(3)^(-)` is/are: `Br^(-),I^(-),CO_(3)^(2-),NO_(2)^(-),CIO_(3)^(-),CrO_(4)^(-2)` |
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Answer» Correct Answer - 5 `Br^(-),I^(-),CO_(3)^(2-),NO_(2)^(-),CIO_(3)^(-),CrO_(4)^(-2)` |
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| 2. |
A sample of sparingly soluble `PbI_(2)(s)` containing radioactive `I-133` is added to `0.10M KI(aq)` and stirred overnight. Observations about this system include which of the following? (P) The radioactivity of the liquid phase increases significantly. (Q) The concentration of the `I^(-)` ion in solution increases significantly.A. P onlyB. R onlyC. Both P and QD. Neither P nor Q |
| Answer» Correct Answer - A | |
| 3. |
Among the following compounds insoluble in water is/are: `PbI_(2),HgI_(2),Hg_(2)OCI_(2),NaCI,KI,AgCI` |
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Answer» Correct Answer - 4 `PbI_(2),HgI_(2),Hg_(2)OCI_(2),AgCI` |
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| 4. |
Which of the following pairs of ions would be expected to form precipitate when dilute solution are mixed ?A. `Na^(+),SO_(4)^(2-)`B. `NH_(4)^(+),CO_(3)^(2-)`C. `Na^(+),S_(2)^(2-)`D. `Fe^(2+),PO_(4)^(3-)` |
| Answer» Correct Answer - D | |
| 5. |
Mark the correct statement:A. I group basic radicals precipitate as chloroidesB. IV group basic radicals precipitates as sulphidesC. V group basic radicals precipitates as carbonatesD. All of the above statements are correct |
| Answer» Correct Answer - D | |
| 6. |
The composition of golden spangles isA. `PbCrO_(4)`B. `PbI_(2)`C. `As_(2)S_(3)`D. `BaCrO_(4)` |
| Answer» Correct Answer - B | |
| 7. |
Ammonia/ammonium ion gives yellow precipitate with:A. `H_(2)PtCI_(6)`B. `HgCI_(2)`C. `Na_(3)[Co(NO_(2))_(6)]`D. (a) and (c) both |
| Answer» Correct Answer - D | |
| 8. |
Among the following, total numbe of reagent(s) which gives yellow precipitate with ammonium chloride solution. `Na_(3)[Co(NO_(2))_(6)], H_(2)[PtCI_(6)], (NaH.C_(4)H_(4)O_(6)), NaCIO_(4), NaOH` |
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Answer» Correct Answer - 2 `Na_(3)[Co(NO_(2))_(6)], H_(2)[PtCI_(6)]` |
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| 9. |
Select the correct statement with respect to `Fe^(3+)` ions:A. Iron (III) ions reacts with `H_(2)S` in acidic solution to give a black precipitate of `Fe_(2)S_(3)`B. Iron (III) ions react with ammonium sulphide to give the black precipitate of `Fe_(2)S_(3)`C. Iron (III) ions react with ammonium thiocyanate solution to produce deep red colourationD. All of the above |
| Answer» Correct Answer - C | |
| 10. |
A mixture of chlorides of copper, cadmium, chromium, iron and aluminium was dissolved in water. It was acidified with dilute `HCI` and then hydrogen sulphide gas was passed for sufficient time. It was filtered, boiled and a few drops of nitric acid were added, while boiling. To this solution, ammonium chloride and ammonium hydroxide were added. To this excess of sodium hydroxide was added and then filtered. The filtrate shall give test for:A. sodium and ironB. sodium, chromium and aluminiumC. aluminium and ironD. sodium, iron, cadmium and aluminium |
| Answer» Correct Answer - B | |
| 11. |
What is the shape of anionic part of (C)?A. Trigonal planarB. TetrahedralC. TBPD. Square planar |
| Answer» Correct Answer - B | |
| 12. |
The total number of anionic species which give coloured gas with conc. `H_(2)SO_(4)`are: `CO_(3)^(2-),HCO_(3)^(-),SO_(3)^(2-),NO_(3)^(-),S_(2)O_(3)^(2-),CH_(3)COO^(-),SO_(4)^(2-)`. |
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Answer» Correct Answer - 2 `NO_(3)^(-),NO_(2)^(-)` |
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| 13. |
`{:(FeCI_(3)"solution" +(NH_(4))_(2)S overset("Neutral medium")rarr,"Black ppt".(A)),(," "darrdil.H_(2)SO_(4)),(,"White ppt". (B) +Gas (C)):}` while `AICI_(3)` solution `+(NH_(4))_(2)S rarr` White ppt.(D) What is the formula of black ppt.(A)?A. `Fe_(2)S_(3)`B. `FeS`C. `2FeS +S`D. `FeS + Fe(OH)_(3)` |
| Answer» Correct Answer - C | |
| 14. |
Among the following, total number of compound(s) which reduce(s) the yellow solution of `FeCI_(3)` are: `{:("Tin(II)chloride",,"potassium iodide",),("hydroxylamine",,"hydrazine sulphate",),("ascorbic acid",,"hydrogen sulphide",),("sulphur dioxide",,"potassium dichromate",),("conc.nitric acid",):}` |
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Answer» Correct Answer - 7 `{:("Tin(II) chloride",,"Potassium iodide",),("Hydroxylamine",,"Hydrazine sulphate",),("Ascorbic acid",,"Hydrogen sulphide",),("Sulphur dioxide",):}` |
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| 15. |
When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous `NaCI` to the blue solution gives a white precipitate O. Addition of aqueous `NH_(3)` dissolves O and gives an intense blue solution. The compound N is:A. `AgNO_(3)`B. `Zn(NO_(3))_(2)`C. `AI(NO_(3))_(3)`D. `Pb(NO_(3))_(2)` |
| Answer» Correct Answer - A | |
| 16. |
When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous `NaCI` to the blue solution gives a white precipitate O. Addition of aqueous `NH_(3)` dissolves O and gives an intense blue solution. The final solution contains:A. `[Pb(NH_(3))_(4)]^(2+)` and `[CoCI_(4)]^(2-)`B. `[AI(NH_(3))_(4)]^(3+)` and `[Cu(NH_(3))_(4)]^(2+)`C. `[Ag(NH_(3))_(2)]^(+)` and `[Cu(NH_(3))_(4)]^(2+)`D. `[Ag(NH_(3))_(2)]^(+)` and `[Ni(NH_(3))_(6)]^(2+)` |
| Answer» Correct Answer - C | |
| 17. |
`{:(FeCI_(3)"solution" +(NH_(4))_(2)S overset("Neutral medium")rarr,"Black ppt".(A)),(," "darrdil.H_(2)SO_(4)),(,"White ppt". (B) +Gas (C)):}` while `AICI_(3)` solution `+(NH_(4))_(2)S rarr` White ppt.(D) White ppt.(D) is :A. `AI_(2)S_(3)`B. `AI_(2)S_(3)+S`C. `AI(OH)_(3)`D. `AI(OH)_(3)+AI` |
| Answer» Correct Answer - C | |
| 18. |
When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous `NaCI` to the blue solution gives a white precipitate O. Addition of aqueous `NH_(3)` dissolves O and gives an intense blue solution. The metal rod M is:A. `Fe`B. `Cu`C. `Ni`D. `Co` |
| Answer» Correct Answer - B | |
| 19. |
For aqueous solutions of which of the following substances could the concentration be determined by visible spectrophotometry? (P) `Cr(NO_(3))_(3)` (Q) `KMnO_(4)` (R) `Zn(NO_(3))_(2)`A. P onlyB. R onlyC. P and Q onlyD. P,Q and R |
| Answer» Correct Answer - C | |
| 20. |
When a neutral or slightly alkaline solution of thiosulphate is treated with the `[Ni(en)_(3)] (NO_(3))_(2)` complex, then:A. green precipitate is obtainedB. brown precipitate is obtainedC. violet precipitate is obtainedD. yellow precipitate is obtained |
| Answer» Correct Answer - C | |
| 21. |
When gas E reacts with sodium nitroprusside in basic medium then compound Z is formed. The colour of compound Z is :A. GreenB. PurpleC. Reddish brownD. Black |
| Answer» Correct Answer - B | |
| 22. |
When A reacts with `Pb(NO_(3))_(2)` then compound X is formed. Compound X is oxidized by atmospheric oxygen on boiling, then Y is formed whar is the colour of Y?A. YellowB. WhiteC. BlackD. Green |
| Answer» Correct Answer - B | |
| 23. |
Which metal reacts most vigorously with water ?A. `Na`B. `Mg`C. `K`D. `Ca` |
| Answer» Correct Answer - C | |
| 24. |
Which salt is significantly more soluble in a strong acid than in water?A. `PbF_(2)`B. `PbCI_(2)`C. `PbBr_(2)`D. `PbI_(2)` |
| Answer» Correct Answer - A | |
| 25. |
A sample of white solid is known to be `NaHCO_(3), AgNO_(3),Na_(2)S`, or `CaBr_(2)`. Which `0.1M` aqueous solution can be used to confirm the identity of the solid?A. `NH_(3)aq`B. `HCI(aq)`C. `NaOH(aq)`D. `KCI(aq)` |
| Answer» Correct Answer - B | |
| 26. |
What is the colour of the flame test for sodium?A. GreenB. RedC. violetD. Yellow |
| Answer» Correct Answer - D | |
| 27. |
What is the characteristic colour of the flame test for potassium?A. YellowB. RedC. GreenD. Violet |
| Answer» Correct Answer - D | |
| 28. |
A flame test was performed to confirm the identity of a metal ion in solution. The result was a green flame. Which of the following metal ions is indicated?A. CopperB. SodiumC. StrontiumD. Zinc |
| Answer» Correct Answer - A | |
| 29. |
Which solid is most soluble in water at `25^(@)C`?A. `AgNO_(3)`B. `CaCO_(3)`C. `PbO`D. `ZnS` |
| Answer» Correct Answer - A | |
| 30. |
Which of the following reagents (s) is/are required to give water soluble dye stuff, methylene blue in strongly acidic solution with `H_(2)S`?A. B. C. `FeCI_(3)`D. `FeCI_(2)` |
| Answer» Correct Answer - A::C | |
| 31. |
Which compound forms a colourless solution when dissolved in `H_(2)O`?A. `Co(NO_(3))_(2)`B. `KMnO_(4)`C. `Na_(2)Cr_(2)O_(7)`D. `ZnCI_(2)` |
| Answer» Correct Answer - D | |
| 32. |
Which solid is much more soluble in `1MHCI` than in `H_(2)O`?A. `CaHPO_(4)`B. `CaCI_(2)`C. `BaBr_(2)`D. `BaSO_(4)` |
| Answer» Correct Answer - A | |
| 33. |
Which solute has the greatest solubility (in mol/L) in water at `25^(@)C` and 1 atm?A. `CH_(4)`B. `NH_(3)`C. `AgCI`D. `CaSO_(4)` |
| Answer» Correct Answer - B | |
| 34. |
When small amount of `SnCl_(2)` is added to a solution of `Hg^(2+)` ions, a silky white precipitate is obtained. The silky white precipitate is due to the formation of:A. `Hg_(2)CI_(2)`B. `SnCI_(4)`C. `Sn`D. `Hg` |
| Answer» Correct Answer - A | |
| 35. |
The solubility of `KCIO_(3)` at several temperature is shown in the accoupanying diagram. A student mixed `10.0g` of `KCIO_(3)` with `45.0g` of `H_(2)O` and stires it for a long time at `60^(@)C` until the solution is completely clear then allows it to cool slowly to `20^(@)C` where it remains clear. which statement about the final clear mixture at `20^(@)C` is correct ?A. It is a saturated solutionB. It is an unsaturated solution and can be made saturated by decreasing the temperatureC. It is an unsaturated solution and can be made saturated by increasing the temperatureD. It is supersaturared solution |
| Answer» Correct Answer - D | |
| 36. |
The aqueous solution of the following salts will be coloured in the case of:A. `Zn(NO_(3))_(2)`B. `LiNO_(3)`C. `Co(NO_(3))_(2)`D. Potash alum |
| Answer» Correct Answer - C | |
| 37. |
When `H_(2)S` gas is passed through a hot acidic aqueous solution containing `Cr^(+3), Cd^(+2), Hg^(+2)` and `Co^(+2)`, a precipitate is formed which does not consist of:A. `Cr_(2)S_(3)`B. `HgS`C. `CoS`D. `CdS` |
| Answer» Correct Answer - A::C | |
| 38. |
Statement-1: Test of `NH_(4)^(+)` cannot be done within group analysis. Statement-2: During group analysis several times `NH_(4)^(+)` compound is added at the different steps.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-48C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - A | |
| 39. |
Which of the following salts will not produce any observable changes when `H_(2)S` is passed through its aqueous solution?A. `(CH_(3)CO_(2))Pb`B. `Na_(2)[Ge(CN)_(5)NO]`C. `AgNO_(3)`D. None of these |
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Answer» Correct Answer - B `H_(2)S` is a weak acid, so does not dissociate significantly to gives `S^(2-)`. Alkaline medium helps. |
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| 40. |
Which of the following pair of compounds cannot co-exist in aqueous solution?A. `Na_(2)CO_(3),K_(2)CO_(3)`B. `NaHCO_(3),NaOH`C. `Rb_(2)CO_(3),KHCO_(3)`D. `NaOH` and `KCI` |
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Answer» Correct Answer - B `NaHCO_(3) + NaOH rarr Na_(2)CO_(3)+H_(2)O` |
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| 41. |
Statement-1: `LiHCO_(3)` cannot exist in solid form. Statement-2: `Li_(2)O` has the highest thermal stability among the alkali metal oxide.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-39C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 42. |
Which of the following does not give metal oxide on heating?A. `Na_(2)CO_(3)`B. `K_(2)CO_(3)`C. `Rb_(2)CO_(3)`D. All of these |
| Answer» Correct Answer - D | |
| 43. |
A white crystalline substance dissolves in water.On passing `H_(2)S` in this solution, a black precipitate is obtained.The black precipitate dissolves completely in hot `HNO_(3)`.On adding a few drops of concentrated `H_(2)SO_(4)`, a white precipitate is obtained.This precipitate is that ofA. `BaSo_(4)`B. `SrSO_(4)`C. `PbSO_(4)`D. `CdSO_(4)` |
| Answer» Correct Answer - C | |
| 44. |
Which of the following metal bicarbonate will give metal oxide and `CO_(2)` on heating?A. `NaHCO_(3)`B. `Mg(HCO_(3))_(2)`C. `KHCO_(3)`D. `Rb_(2)CO_(3)` |
| Answer» Correct Answer - B | |
| 45. |
Which of the following ammonium salt will not give acid on heating?A. `(NH_(4))_(2)HPO_(4)`B. `(NH_(4))_(2)MoO_(4)`C. `(NH_(4))_(2)SO_(4)`D. `NH_(4)CI` |
| Answer» Correct Answer - B | |
| 46. |
Which of the following salts show chromyl chloride test?A. `KCI`B. `CrCI_(3)`C. `HgCI_(2)`D. `FeCI_(3)` |
| Answer» Correct Answer - A::B::D | |
| 47. |
Which of the following metal nitrate will give metal and oxygen on heating?A. `KNO_(3)`B. `NaNO_(3)`C. `AgNO_(3)`D. `RbNO_(3)` |
| Answer» Correct Answer - C | |
| 48. |
Which of the following nitrate will give `N_(2)O` on heating?A. `NH_(4)NO_(3)`B. `NH_(4)NO_(2)`C. `NaNO_(3)`D. `AgNO_(3)` |
| Answer» Correct Answer - A | |
| 49. |
Which of the following compound(s) give white precipitate with silver nitrate solution?A. `NaCI`B. `KSCN`C. `KCN`D. `Na_(2)S_(2)O_(3)` |
| Answer» Correct Answer - A::B::C::D | |
| 50. |
Which of the following compound gives white precipitate with silver nitrate solution?A. `NaCI`B. `Na_(2)CO_(3)`C. `Na_(2)SO_(3)`D. `Na_(2)S_(2)O_(3)` |
| Answer» Correct Answer - A::B::C::D | |