12th Chemistry Important 1 Marks Transition & Inner Transition Elements

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TN 12th Chemistry Important 1 Marks Transition & Inner Transition Elements. 12th Chemistry Important Questions Chapter 4. +2 Chemistry Important 2 Marks,  3 Marks, 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). HSC 12th Chemistry Revision Test Important Questions. 12th Tamil Full Guide.

Transition & Inner Transition Elements:

• 1. According to Spectrochemical series CO ligand produces strongest field and cause maximum splitting.
• 2. In dichromate anion Cr₂O7₂– 6 Cr – O bonds are equivalent.
• 3. Nickel tetra carbonyl is tetrahedral, and paramagnetic this statement is correct.
• 4. In Chromyl chloride dissolved Sodium hydroxide solution gives yellow solution. The yellow solution contains CrO₄^2-
• 5. Cd²⁺ ion of slat in white in colur.
• 6. For the 4 successive transitions elements [ Cr, Mn, Fe & Co ] the stability of +2 oxidation state will be there in this order Mn > Fe > Cr > Co
• 7. The Magnetic moment of Cr3+ is 3.87 BM
• 8. Equivalent weight of in neutral medium is 52.67
• 9. The transition element which has only +3 oxidation state is Sc
• 10. The actual position of Lanthanoids in the periodic table is at Group number 3 & Period number 6
• 11. Americium & Thorium pair of actinoids shows +2 Oxidation state.
• 12. Sc³⁺ forms colorless compound.
• 13. The lanthanoids contraction is responsible for the fact that Zr & Hf have almost the same radius
• 14. The UO2²⁺ is yellow
• 15. The reagent used for detecting unsaturation Bayer’s reagent
• 16. The actual electronic configuration of lanthanide is [Xe]4f⁰5d¹6s²
• 17. Transition elements that show anomalous electronic configuration in first series are Cr & Cu
• 18. The transition metal present in Vitamin B12 is Co
• 19. A mixture of TiCl4 & Trialkyl aluminium is Zeigler-Natta catalyst
• 20. Cold dilute alkaline KMno₄ is known as Baeyer’s reagent.
• 21. The element corresponding to the electronic configuration [Rn]5f³6d¹7s² is
  Uranium
• 22. The common oxidation state for lanthanide is +3
• 23. The general electronic configuration of lanthanide series is [Xe]4f^2-145d^0-
  46s²
• 24. The transition element present in Hemoglobin is Iron
• 25. If the standard electrode potential (E0) of a metal is Large and negative the metal is powerful reducing agent.
• 26. The catalytic activity of transition metal due to formation of variable oxidation state, formation of intermediate products, capability forming interstitial compounds.
• 27. Most of the transition metal ions coloured, because of the Presence of unpaired electrons, Energy gap between two energy levels is very small.
• 28. Increase in tendency to act as reducing agent is the wrong statement of lanthanide contraction.
• 29. Titanium metal is used in manufacturing artificial joints.
• 30. The highest possible oxidation state shown by Osmium in its compounds is
  +8
  
• 31. Cr³⁺ is the paramagnetic species.
• 32. The trend in ionization enthalpy of a transition element is not regular because removal of one electron alters the relation energies of 4s & 3d orbitals.
  
• 33. Oxygen stabilizes higher oxidation state because of its tendency to form multiple bond.
• 34. Among Ni, Mn, V, & Zr Mn exhibits highest oxidation state.
• 35. Ce(Z=58) & Yb(Z=70) exhibits stable +1 & +2 oxidation states respectively. This is because Ce⁴⁺ & Yb²⁺ acquire f⁷ & f¹⁴ configuration.
• 36. The following is Mno₄^– , CrO₄^2-, Cu₂o coloured due to charge transfer.
• 37. Zn²⁺ is not coloured because in outermost shell is completely filled.
• 38. The correct statement is upon strong heating paramagnetic gases are evolved by NaNO₃ & AgNO₃
  
• 39. The following statements is all metals except Sc forms ‘MO’ oxide
• 40. The complex compound act as oxygen transport of human is Hemoglobin
• 41. CrO₃ is color spectra are due to Charge transfer spectra.
• 42. Molybdenum transition metal is applied in the manufacturing of boilers plants.
• 43. The correct reason for lanthanide contraction is neglible screening effect.
• 44. Ti³⁺(Z=22) ions will exhibit the maximum oxidation state.
• 45. Neptunium & plutonium exhibit the maximum oxidation state as +7
• 46. Value of magnetic moment of a divalent metal ion is 5.92BM. Total number of electrons in its atom would be 25
• 47. The electronic configuration of Scandium is [Ar]3d¹4s²
• 48. The general electronic configuration of d-block element can be written as
  [Noble gas] n-1 d^1-10 ns^1-2
• 49. Europium is not belongs to d-block elements.
• 50. A magnetic moment of 1.73BM 2Ill be shown in [Cu(NH₃)₄]²⁺
• The magnetic moment of Mn2+ ion is 5.92BM
• 52. Yb²⁺ lanthanoid ions are diamagnetic.
• 53. The actinoid element show the highest oxidation state +7 are Np, Pu,Am
• 54. Sc(Z=21) is a transition element but Zn (Z = 30) is not because In case of Sc³⁺ and Zn²⁺ ions are colourless and form white compounds
• 55. La (OH)₃ is less basic than Lu(OH)₃ (Assertion), Covalent character of Ln(OH)₃ decreases on moving from La³⁺ to Lu³⁺ (Reason) Ans. Both Assertion and Reason are false.
• 56. Ce⁴⁺ is used as an oxidizing agent in volumetric analysis. (Assertion), Ce⁴⁺ has the tendency of attaining +3 oxidation state. Ans. Both assertion & Reason are true and reason is the correct explanation of assertion.
  
• 57. How many moles of iodine are liberated when one mole of potassium dichromate react with potassium iodide 3
• 58. Ni²⁺ ions have the same no. of. Unpaired electrons as present in Vanadium ion.
• 59. Chromium has half-filled penultimate d – subshell as well as half-filled valence subshell.
• 60. The correct order of increasing oxidizing power in the series VO₂⁺ < Cr₂O₇^2-
  < Mno₄^–