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.
| 51. |
How many 3d series elements (Sc to Zn) have positive standard potential for `M^(2+)//M`? |
| Answer» Correct Answer - A | |
| 52. |
Metal-Metal bonding is more frequent in 4d or 5d series than in 3d series due toA. Their greater enthalpy of atomisationB. Large size of orbitals which participate in bondingC. their ability to involve both ns and (n-1)d orbitals in bond formationD. The comparable size of 4d and 5d series elements |
| Answer» Correct Answer - A | |
| 53. |
How many of the following reactions cannot occur? `(1) Fe+2HClrarrFeCl_(2)+H_(2) uarr` `(2) Cu+2HClrarr CuCl_(2)+H_(2)uarr` `(3) Cu+ZnSO_(4)rarrCuSO_(4)rarrCuSO_(4)+Zndarr` `(4) Zn+2AgNO_(3)rarrZn(NO_(3))_(2)+2Agdarr` `(5) Cu+2AgNO_(3)rarrCu(NO_(3))_(2)+2Agdarr` `(6) Fe+CuSO_(4)rarrFeSO_(4)+Cudarr` |
| Answer» Correct Answer - B | |
| 54. |
What is the composition of the alloy Alnico? |
| Answer» Correct Answer - C | |
| 55. |
In the calcultion of magnetic moment. The orbital magnetic moment contribution is negligible for the following ionA. `Pt^(+2)`B. `Mo^(+2)`C. `Pd^(+2)`D. `Ti^(+3)` |
| Answer» Correct Answer - D | |
| 56. |
The chemical formula of sideriteA. `Fe_(2)O_(3)`B. `Fe_(3)O_(4)`C. `FeCO_(3)`D. `MnO_(2)` |
| Answer» Correct Answer - C | |
| 57. |
The mineral of silver isA. ArgentiteB. Horn silverC. SylvineD. Both 1 and 2 |
| Answer» Correct Answer - D | |
| 58. |
The metal that forms interstitial nitride isA. MgB. CaC. CrD. Li |
| Answer» Correct Answer - C | |
| 59. |
Which is highly coloured due to inter valence electron transfer transitions?A. `FeO`B. `Cr_(2)O_(3)`C. `Fe_(3)O_(4)`D. `CuO` |
| Answer» Correct Answer - C | |
| 60. |
The ion having maximum magnetic moment isA. `Co^(+3)`B. `Cr^(+3)`C. `Ni^(+2)`D. `Cu^(+1)` |
| Answer» Correct Answer - A | |
| 61. |
Which of the following is ionic in nature?A. `CuF_(2)`B. `CuCl_(2)`C. `CuBr_(2)`D. `CuI_(2)` |
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Answer» Correct Answer - A Among `F^(-) Cl^(-) Br^(-)` and `I^(-)` due to small size of `F^(-)` its polorisibility is least and hence more inonic in nature. |
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| 62. |
The following is not a ferromagneticA. FeB. CoC. YD. Ni |
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Answer» Correct Answer - C `Cr_(2)O_(7)^(-2) + 14H^(+) + 3Sn^(+2) rarr 2Cr^(+3) + 7H_(2)O + 3Sn^(+4)` |
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| 63. |
The following metal shows ferromagnetic natureA. CoB. CrC. CuD. Mn |
| Answer» Correct Answer - A | |
| 64. |
Metal (s) which does/do not form amalgam is/are :A. FeB. ZnC. NiD. Au |
| Answer» Correct Answer - A | |
| 65. |
For a paramagnetic substance, the field strength of substance (B) and applied field strength (H) are related asA. `B = H`B. `B lt H`C. `B gt H`D. `B gt gt H` |
| Answer» Correct Answer - C | |
| 66. |
Best conductor of electricity isA. CuB. AlC. AuD. Ag |
| Answer» Correct Answer - D | |
| 67. |
Cementite is:A. Interstitial compound of iron and carbonB. An alloy of Fe and CrC. A compound resembling cementD. An ore of ion |
| Answer» Correct Answer - A | |
| 68. |
`{:("List -I","List-II"),("(A) Rutile",(i) ZnCO_(3)),("B) Chromite","(ii) MnO_(2)),("(C) Pyrolusite",(iii) FeO.Cr_(2)O_(3)),("(D) Calamine",(iv) TiO_(2)):}`A. A-iv, B-iii, C-ii, D-iB. A-I, B-ii, C-iii, D-ivC. A-I, B-iii, C-iv, D-iD. A-iv, B-I, C-ii, D-ii |
| Answer» Correct Answer - A | |
| 69. |
In the presence of strong electrical field, the following set of orbitals are not degenerateA. `3d_(xy)` and `3d_(z^(2))`B. `3d_(xy)` and `3d_(yz)`C. `3d_(xy), 3d_(yz)` and `3d_(zx)`D. `3d_(x^(2) - y^(2))` and `3d_(z^(2))` |
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Answer» Correct Answer - A In d orbital the splitting is a) `dxy, dyz,dzx`- degenerate orbitals b) `d_(x^(2)- y^(2)), d_(z^(2))` degenerate orbitals |
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| 70. |
Which transition metal is known as stratagic or Wonder metal?A. TungstenB. PlatinumC. IronD. Titanium |
| Answer» Correct Answer - D | |
| 71. |
Which of the following is the stable electron configuration of `Fe^(+3)`ionA. `3d^(6)4s^(0)`B. `3d^(5)4s^(0)`C. `3d^(6)4s^(2)`D. `3d^(4)4s^(2)` |
| Answer» Correct Answer - B | |
| 72. |
`ns^(1)` electron configuration is not present inA. AgB. MnC. CrD. Cu |
| Answer» Correct Answer - B | |
| 73. |
The general configuration `(n-1)d^(3)ns^(2)` indicates that particular element belongs to the following groupA. II BB. I BC. V BD. III B |
| Answer» Correct Answer - C | |
| 74. |
Zn and Cd metals do not show varible valency because:A. They have only two electrons in the outermost subshellsB. their d-subshells are completely filledC. their d-subshells are partially filledD. they are relative soft metals |
| Answer» Correct Answer - B | |
| 75. |
The following belongs to d-block but it sis not a transition elementA. MnB. FeC. ZnD. Cr |
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Answer» Correct Answer - C Transition element shall have an incompletely filled `d-` sublevel `._(30)^(Zn)[Ar]4s^(2)3d^(10)` is d-block element but not transition element. |
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| 76. |
Transition element which is volatileA. ZnB. CdC. HgD. All |
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Answer» Correct Answer - A Boiling point a `(1)/("Volatility")`, ZnCd, Hg possess low B.P and hence highly volatile. |
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| 77. |
Electronic confriguration of a transition element X in +3 oxidation states is `[Ar]3d^(5)`. What is its atomic number?A. 25B. 26C. 27D. 24 |
| Answer» Correct Answer - B | |
| 78. |
The group numbers of transition elementsA. 1 to 10B. 1 to 9C. 3 to 11D. 3 to 12 |
| Answer» Correct Answer - C | |
| 79. |
The diamagnetic compounds is/areA. `HgCl_(2)`B. `Hg_(2)Cl_(2)`C. `Cu_(2)Cl_(2)`D. `K_(2)Cr_(2)O_(7)` |
| Answer» Correct Answer - A::B::C::D | |
| 80. |
The true statement among the following are:A. `Cu^(2+)` undergoes disproporationation in aq solutionsB. All `Cu(II)` salts are known except the iodideC. The only transition metal in 3d series with a positive `E^(0)(M^(+2)//M)` value is copperD. Copper has the higest second ionization enthalpy among all the 3d elements |
| Answer» Correct Answer - B::C::D | |
| 81. |
The colour of the transition metal ions is due toA. d-d transition of electrons in presence of ligandsB. charge transfer from ligands to metal ionC. small atomic sizesD. polarisation of anion by cation |
| Answer» Correct Answer - A::B::D | |
| 82. |
In which of the following compounds (s), the colour is due to the charge transfer spectraA. `KMnO_(4)`B. `CrO_(3)`C. `CuCl_(2)`D. `Cu_(2)O` |
| Answer» Correct Answer - A::B::D | |
| 83. |
Transition metals are coloured due to the following electronic transitionA. d-sB. d-dC. s-pD. f-s |
| Answer» Correct Answer - B | |
| 84. |
The metal ion which does not form coloured compound isA. ChromiumB. IronC. ZincD. Manganese |
| Answer» Correct Answer - C | |
| 85. |
Which of the following ion is coloured in its aqueous solution?A. `Cd^(+2)`B. `Zn^(+2)`C. `Sc^(+3)`D. `Ti^(+3)` |
| Answer» Correct Answer - D | |
| 86. |
The pair that has the greatest malleability and ductility property isA. Na, KB. Pb, SnC. Zn, MnD. Cu, Au |
| Answer» Correct Answer - D | |
| 87. |
The following species is repelled by a magnetic fieldA. `Hg^(+2)`B. `Fe^(+2)`C. `Co^(+3)`D. `Ni^(+2)` |
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Answer» Correct Answer - A `Cr_(2)O_(7)^(-2) + 14H^(+) + 6I^(-) rarr 2Cr^(+3) + 7H_(2)O + 3I_(2)` |
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| 88. |
The following is not typical transition elementA. CuB. AgC. AuD. Hg |
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Answer» Correct Answer - D Cu, Ag Au (coinage metals)are typical transition elements. |
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| 89. |
`MnO_(4)^(-) + H^(+) rarr X + Y + Z` (unbalanced), then identify `X,Y`and Z?A. `X = MnO_(4)^(-)`B. `Y = MnO_(2)`C. `Z = O_(2)`D. `Z = H_(2)O` |
| Answer» Correct Answer - A::B::D | |
| 90. |
The property, which is not charactestics of transition metalsA. varible oxidation statesB. tendency to form complexesC. formation of coloured compoundsD. They are usually diamagnetic |
| Answer» Correct Answer - D | |
| 91. |
Which one of the following is correct?A. `MnO_(2)O_(7)` is a covalent green oilB. `V_(2)O_(3) gt V_(2)O_(4) gt V_(2)O_(5)`: basic natureC. `V_(2)O_(4)` dissolved in acids to give `VO^(2+)` salts.D. `V_(2)O_(5)` reacts alkalies as well as acids to give `VO_(4)^(3-)` and `VO_(2)^(+)` respectively. |
| Answer» Correct Answer - A::B::C::D | |
| 92. |
The maximum and minimum melting points of first and second transition series respectively are observed withA. Cr and ZnB. Cr and HgC. V and CdD. Cr and Cd |
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Answer» Correct Answer - D Melting point is maximum for `cr` (`ns^(1)` and `(n-1)d^(5)e^(-)` both are involved in bonding) due to completely filled nature `(ns^(2)(n-1)d^(10))` cd possess low m.p |
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| 93. |
Which one of the following does not exist?A. `FeI_(3)`B. `FeCl_(3)`C. `CoF_(2)`D. `NiCl_(3)` |
| Answer» Correct Answer - A::D | |
| 94. |
Which of the following is arranged in order of incresing melting point ?A. `Zn lt Cu lt Ni lt Fe`B. `Fe lt Ni lt Cu lt Zn`C. `Ni lt Fe lt Zn lt Cu`D. `Cu lt Zn lt Fe lt Ni` |
| Answer» Correct Answer - D | |
| 95. |
Which of the following statements is not correct?A. Copper liberates hydrogen from acidsB. In its higher oxidation stats, Mn forms stable compounds with oxygen anf fluorineC. `Mn^(3+)` and `Co^(3+)` are reducing agents in aqueous solutionD. `Ti^(2+)` and `Cr^(2+)` are reducing agents in aqueous solution |
| Answer» Correct Answer - A | |
| 96. |
Which one of the following is lest stable?A. `VF_(2)`B. `VCl_(2)`C. `VBr_(2)`D. `Vi_(2)` |
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Answer» Correct Answer - A Stable fluoride of V is `VF_(5)`. |
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| 97. |
The metal that has the highest melting point and used in making hard steel isA. CuB. MnC. ZnD. W |
| Answer» Correct Answer - D | |
| 98. |
The common metal present in german silver, bell metal and brass isA. FeB. CuC. ZnD. Sn |
| Answer» Correct Answer - B | |
| 99. |
Zinc does not show variable valency Because of:A. They are softB. Their d subshells are completeC. They have only 2-electrons in outermost subshellsD. Their d subshells are incomplete |
| Answer» Correct Answer - B | |
| 100. |
Metal used for making joints in jewellery isA. ZnB. CuC. AgD. Cd |
| Answer» Correct Answer - D | |