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. |
Which of the following dissolves in hot concentrated NaOH solution?A. FeB. ZnC. CuD. Ag |
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Answer» Correct Answer - B `Zn + NaOH rarr Na_(2)ZnO_(2) + H_(2) uarr` |
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| 2. |
Iron is rendered passive by treatment with concentratedA. HClB. `H_(2)SO_(4)`C. `HNO_(3)`D. both (B) & (C ) |
| Answer» Correct Answer - C | |
| 3. |
Find the correct statement (i) Magnetic moment `Mn^(2+)` ions is `sqrt(35)` (ii) `1` Bohr Magneton `= 9.273 xx 10^(-24) J. "Tesla"^(-1)`A. Only i is correctB. Only ii is correctC. Only i & iii are correctD. All are correct |
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Answer» Correct Answer - C `Ti^(+4)` has `3d^(0)` configuration. |
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| 4. |
Which of the following s a consitutent of lithoponeA. `ZnSO_(4)`B. `ZnS`C. `ZnCl_(2)`D. `ZnO` |
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Answer» Correct Answer - B `ZnS` and `BaSO_(4)` mixture is called lithopane |
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| 5. |
The atomic numbe of the element having magnetic numbe equal to `1.7 BM` in its `+2` oxidation state isA. 29B. 25C. 24D. 30 |
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Answer» Correct Answer - A `mu = 1.7` BM means it contains 1 unpaired electrons. |
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| 6. |
The correct order of `E_(M^(2+)//M)^(@)` Values with negative sign for the four successive elements `Cr, Mn, Fe` and `Co` is:A. `Cr gt Mn gt Fe gt Co`B. `Mn gt Cr gt Fe gt Co`C. `Cr gt Fe gt Mn gt Co`D. `Fe gt Mn gt Cr gt Co` |
| Answer» Correct Answer - A | |
| 7. |
Which one of the following arrangements does not represent the correct order of the property stated against it?A. `Ni^(2+) lt Co^(2+) lt Fe^(2+) lt Mn^(2+)` ionic sizeB. `Co^(3+) lt Fe^(3+) lt Cr^(3+) lt Sc^(3+)` stability in aqueous solutionC. `Sc lt Ti lt Cr lt Mn` number of oxidation statesD. `V^(2+) lt Cr^(2+) lt Mn^(2+) lt Fe^(2+)` paramagnetic behaviour |
| Answer» Correct Answer - A | |
| 8. |
Which of the following cation is colourless in its aqueous solutionA. `Cu^(+2)`B. `Sc^(+3)`C. `Fe^(+3)`D. `Co^(+3)` |
| Answer» Correct Answer - B | |
| 9. |
The IP of Zr is `674kJ//"mole"`. The IP of Hf isA. `656 kJ`B. `760 kJ`C. `616 kJ`D. `631 kJ` |
| Answer» Correct Answer - C | |
| 10. |
The second IP of Cr is high due toA. `3d^(5)`B. `3d^(0)`C. `3d^(10)`D. `3d^(4)` |
| Answer» Correct Answer - A | |
| 11. |
Which one of the following pairs is colouredA. `TiCl_(3),VCl_(2)`B. `TiCl_(4),Cu_(2)Cl_(2)`C. `Hg_(2)Cl_(2)`,anhydrous `CuSO_(4)`D. `AgNO_(3),Cd(NO_(3))_(2)` |
| Answer» Correct Answer - A | |
| 12. |
Which of the following compounds ar coloured substances? `I-Ag_(2)CO_(3) II-Ag_(3)PO_(4) III-Agl IV-Ag_(2)S`A. Only IIIB. only III and IVC. only I,III and IVD. all the four |
| Answer» Correct Answer - D | |
| 13. |
Which of the following metal oxides is white in colour but becomes yellow on heatingA. `Ag_(2)O`B. `ZnO`C. `FeO`D. `MgO` |
| Answer» Correct Answer - B | |
| 14. |
Transition metals are less reactive because of theirA. High ionization potential and low melting pointB. High ionization potential and high melting pointC. Low ionization potential and low melting pointD. Low ionization potential and high melting point |
| Answer» Correct Answer - B | |
| 15. |
Transition metals are good electrical conductors becauseA. They are metalsB. They are solidsC. They have free electrons in outer energy levelsD. They are hard. |
| Answer» Correct Answer - C | |
| 16. |
Transition elements form binary compounds with halogens. Which of the following elements will form `MF_(3)` type compounds?A. `Cr`B. `Co`C. `Cu`D. `Ni` |
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Answer» Correct Answer - A::B Transition element such as `Cr` and `Co` form binary compounds with halogens, i.e., `CrF_(3)` and `CoF_(3)` whereas Cu and Ni do not form `CuF_(3)` and `NiF_(3)`. |
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| 17. |
One of the constituents of an amalgam isA. FeB. HgC. AuD. Os |
| Answer» Correct Answer - B | |
| 18. |
Catalytic activity of transition elements and their compounds is due to theirA. Small sizeB. Vacant d-orbitalsC. Higher densitiesD. Colour |
| Answer» Correct Answer - B | |
| 19. |
Which of the following is not responsible for the catalytical activity of transition metals and their compounds?A. Transition metals have large surface areaB. Transition metals show varible oxidation statesC. Transition metals form intermediate complexesD. Transition metals are coloured |
| Answer» Correct Answer - D | |
| 20. |
In which of the following elements, the configuration is against Auf-bau rule?A. `Ni,Pd,Pt`B. `Sc,Ti,Zr`C. `Pd,Pt,Cu`D. `Fe,Cr,Mn` |
| Answer» Correct Answer - C | |
| 21. |
Which of the following is not an amphoteric oxide?A. HgOB. `PbO_(2)`C. `ZnO`D. `SnO_(2)` |
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Answer» Correct Answer - A Highest oxidation state of `Mn(+7)` in `Mn_(2)O_(7)` indicates its acidc nature. |
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| 22. |
In the formation of intersitital compounds by transition metals, identify the correct statementsA. Melting points of interstial carbides are more than those of respective pure metalsB. Densities of interstial hydrides are less than those respective pure metalsC. Electrical conductivity is lost in the formation of interstial compound from a metalD. Interstitial borides are very hard in nature and less reactive than the parent metals |
| Answer» Correct Answer - A::B::D | |
| 23. |
Oxide of metal cation which is not amphoteric ?A. `Al^(+3)`B. `Cr^(+3)`C. `Fe^(+3)`D. `Zn^(+2)` |
| Answer» Correct Answer - C | |
| 24. |
Which of the following are nonferrous alloys?A. BrassB. BronzeC. Chromium SteelD. German Silver |
| Answer» Correct Answer - A::B::D | |
| 25. |
Which of the following transition metal oxides is(normally) neither acidic nor amphoteric?A. `CrO_(3)`B. `V_(2)O_(5)`C. `Mn_(2)O_(2)`D. `CuO` |
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Answer» Correct Answer - D `CuO` is basic only |
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| 26. |
Which of the following oxides are amphoteric?A. `V^(5+)`B. `Zn^(2+)`C. `Fe^(2+)`D. `Fe^(3+)` |
| Answer» Correct Answer - A::B | |
| 27. |
The configuration of chromium atom in ground state isA. `[Ar]3d^(4)4s^(1)`B. `[Ar]3d^(5)4s^(1)`C. `[Ar]3d^(6)4s^(2)`D. `[Ar]3d^(7)4s^(2)` |
| Answer» Correct Answer - B | |
| 28. |
Which of the following oxides of chromium is amphoteric in nature?A. CrOB. `Cr_(2)O_(3)`C. `CrO_(3)`D. `CrO_(5)` |
| Answer» Correct Answer - B | |
| 29. |
Aqurated copper (I) catin undergoes disproportionation as `2Cu^(+)(aq) rarr Cu^(2+) (aq) + Cu`, becauseA. `Cu^(+)` has `d^(10)` configurationB. `Cu^(2+)` has `d^(10)` configurationC. hydration energy of `Cu^(2+)` is higher than that of `Cu^(+)` which compensates second ionisation energy of Cu.D. size of `Cu^(+) lt Cu^(2+)` |
| Answer» Correct Answer - C | |
| 30. |
Match the catalysts given in column I with the processesn given in column II A. `i-c,ii-d,iii-b,iv-de,v-ab`B. `i-c,ii-d,iii-b,iv-e,v-a`C. `i-c,ii-dc,iii-b,iv-de,v-ab`D. `i-d,ii-c,iii-b,iv-de,v-ab` |
| Answer» Correct Answer - B | |
| 31. |
Match the properties given in Column I with the metals given in Column II A. `i-a,ii-b,iii-d`B. `i-c,ii-a,iii-d`C. `i-c,ii-a,iii-b`D. `i-a,ii-b,iii-c` |
| Answer» Correct Answer - C | |
| 32. |
Match the statements given in Column I with the oxidation states given in Column II. A. `i-c,ii-a,iii-e,iv-b`B. `i-c,ii-a,iii-b,iv-e`C. `i-a,ii-c,iii-b,iv-e`D. `i-e,ii-c,iii-b,iv-a` |
| Answer» Correct Answer - A | |
| 33. |
Match the solutions given in Column I and the colours given in Column II. A. `i-d,ii-a,iii-b,iv-e,v-a`B. `i-d,ii-a,iii-b,iv-a,v-e`C. `i-b,ii-a,iii-d,iv-a,v-e`D. `i-e,ii-a,iii-d,iv-a,v-e` |
| Answer» Correct Answer - A | |
| 34. |
On the basis of trends in the properties of the `3d`-series elements , suggested possible `M^(2+)` aqua ions for use as reducing agents , and write a balanced chemical equation for the reaction of one of those ions with `O_(2)` in acidic solution. |
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Answer» Because oxidation state `+2` is most stable for the later elements of `3d`-series element, strongs reducing agents include ions of the metals on the left of the series: such ions include `V^(2+)` (aq) and `Cr^(2+)` (aq) the `Fe^(2+)` (aq) ion is only weakly reducing. The `Co^(2+)` (aq), `Ni^(2+)` (aq), and `Cu^(2+)` (aq) ions are not oxidized in water. `Fe^(3+)overset(+0.77)rarrFe^(2+)overset(-0.44)rarrFe` The chemical equation for the oxidation is then `4Fe^(2+) (aq) + O_(2)(g) + 4H^(+) (aq) rarr 4Fe^(3+) (aq) +2H_(2)O(I)` |
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| 35. |
In which of the following compound Mn shows maximum radius?A. `MnO_(2)`B. `KMnO_(4)`C. `MnO`D. `K_(2)[Mn(CN)_(6)]` |
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Answer» Correct Answer - C With decrease in charge size increases |
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| 36. |
Sodium chromate on treatment with lead acetate gives a precipitate. This precipitate is dried and the solid is used as a pigment for road sign and markings. The solid is known asA. White leadB. Chrome greenC. Chrome yellowD. Red lead |
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Answer» Correct Answer - C `Na_(2)CrO_(4) + Pb(CH_(3)COO)_(2)rarr` `2CH_(3)COONa + PbCrO_(4)` `PbCrO_(4)` is known as chrome yellow. |
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| 37. |
Which of the following pair of elements have same radii?A. Zr,HfB. Sc,YC. La,AcD. Zn,Cd |
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Answer» Correct Answer - A `Zr` and Hf have same radii due to lanthanide contraction. |
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| 38. |
Which of the following is the best reductant?A. `Co^(2+)` (aq)B. `Fe^(2+)` (aq)C. `Cr^(2+)` (aq)D. `Cu^(2+)` (aq) |
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Answer» Correct Answer - C `Cr^(2+)//Cr^(3+)` has maximum SOP |
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| 39. |
Which of the following is the best oxidant?A. `Cr^(3+)` (aq)B. `Fe^(3+)` (aq)C. `Co^(3+)` (aq)D. `Sc^(3+)` (aq) |
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Answer» Correct Answer - C `Co^(3+)//Co^(2+)` has maximum SRP |
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| 40. |
In solution, the stability of the d-block compounds depends upon electrode potential. The electrode potential depends upon which of the following parameters. (i) Entlhalpy of sublimation (ii) Ionisation enthalpy (iii) Hydration enthalpyA. i,ii onlyB. i, ii only iiiC. i, iii onlyD. ii,iii only |
| Answer» Correct Answer - B | |
| 41. |
The least stable oxide at room temperature isA. CuOB. `Ag_(2)O`C. `ZnO`D. `Hg_(2)O` |
| Answer» Correct Answer - B | |
| 42. |
Element with atomic number 111 might, belong to the following groupA. ChromiumB. ScandiumC. CopperD. Titanium |
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Answer» Correct Answer - C `Cu(Z=79), Ag (Z=47),Au(Z=79)` `79 + 32 = 111` |
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| 43. |
Match the following. A. `{:(A,B,C,D),(3,4,1,2):}`B. `{:(A,B,C,D),(4,1,2,3):}`C. `{:(A,B,C,D),(3,4,2,1):}`D. `{:(A,B,C,D),(2,1,3,4):}` |
| Answer» Correct Answer - A | |
| 44. |
Which of the following statement(s) is /are correct for the alloys, bronzene, brass , gun metal , and solder?A. Brass contains Cu and Zn.B. Gun metal contains Cu, and Sn.C. Solder metal contains Sn and Pb.D. Bronze contains Zn, Sn and Pb. |
| Answer» Correct Answer - A::B::C | |
| 45. |
Which of the following electronic configruation would be associated with the highest magnetic momentA. `[Ar]3d^(8)`B. `[Ar]3d^(3)`C. `[Ar]3d^(6)`D. `[Ar]3d^(7)` |
| Answer» Correct Answer - C | |
| 46. |
Which one of the following statement(s) is/are correct?A. Copper can displace hydrogen from dilute acidsB. First ionisation enthalpy of Cr is lower than that of `Zn`C. The second and third rows of transition elements resembles each other much more than they resembles the first row.D. In the series Sc to Zn, the enthalpy of atomisation of Zn is the lowest. |
| Answer» Correct Answer - B::C::D | |
| 47. |
Which of the following ions show higher spin only magnetic moment value?A. `Ti^(3+)`B. `Co^(3+)`C. `Mn^(2+)`D. `Fe^(2+)` |
| Answer» Correct Answer - C::D | |
| 48. |
The magnetic moment of two ions `M^(x+)` and `M^(y+)` of the element `M(Z=26)` is found to be `5.916B.M.` If `x gt y`, then which of the following statement is correct?A. `M^(y+)` is more stable than `M^(x+)`B. `M^(y+)` is less stable than `M^(x+)`C. Both are equally stableD. Can not be perdicated |
| Answer» Correct Answer - B | |
| 49. |
A compound of metal ion `M^(x+) (z=25)` has spin only magnetic moment of `sqrt(15)B.M.` The positive O.S. of the metal isA. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - C | |
| 50. |
Match the pair of substance having similar properties |
| Answer» Correct Answer - `a-pq;b-pq;c-pqr;d-ps` | |