The d- and f- Block Elements MCQs Mock Test of Class 12th Chemistry

Welcome to your The d- and f- Block Elements MCQs Mock Test of Class 12th Chemistry

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Question 1. A developer used in photography is

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Question 2. Which of the following compounds, on reaction with NaOH and Na2O2, gives yellow colour?

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Question 3. The electronic configuration of actinides cannot be assigned with degree of certainty because of

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Question 4. MnO4– is of intense pink colour, though Mn is in +7 oxidation state. It is due to

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Question 5. Among the following series of transition metai ions, the one in which all metal ions have 3 d2– electronic configuration is (Atomic number: Ti= 22, V= 23, Cr= 24, Mn= 25)

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Question 6. Which one of the following ions is the most stable in aqueous solution? (Atomic number: Ti = 22, V=23, Cr = 24, Mn = 25).

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Question 7. Which of the following element has maximum first ionisation potential?

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Question 8. Mercury is a liquid metal because

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Question 9. Which of the following compounds volatises on heating?

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Question 10. Among of the following outermost configurations of transition metals, which shows the highest oxidation state?

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Question 11. Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

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Question 12. Among the following pair of ions, the lower oxidation state in aqueous solution is more stable then the order is

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Question 13. Which oxide of manganese is amphoteric?

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Question 14. Which one of the following oxides is ionic?

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Question 15. The basic character of the transition metal monoxides follows the order

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Question 16. Which of the following is highly corrosive?

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Question 17. Which of the following is amphoteric oxide? Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4

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Question 18. Paramagnetism is given by the relation μ= 2√[S(S +1)] magnetons where ‘S is the total spin. On the basis, the paramagnetism of Cu+ ion is

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Question 19. Which of the following ions form most stable complex compound?

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Question 20. Among the following, compound that is both paramagnetic and coloured is

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Question 21. Amongst the following, the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by

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Question 22. Which of the following has highest magnetic moment?

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Question 23. The spin only magnetic moment of Mn4+ ion is nearly

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Question 24. Amongst TiF2-6, CoF3-6, Cu2Cl2 and NiCl2-4, the colourless species are (atomic number Ti =22, Co = 27, Cu = 29, Ni = 28)

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Question 25. Cuprous ion is colourless, while cupric ion is coloured because

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Question 26. The catalytic activity of the transition metals and their compounds is ascribed to their

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Question 27. Acidified potassium permanganate solution is decolourised by

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Question 28. With K4[Fe(CN)6],Cu2+ ions give

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In the above reaction, X is

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Question 30. On igniting Fe2O3 at 1400°C, the product obtained is

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Question 31. Acidified solution of potassium dichromate on treatment with H2O2 yields

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Question 32. Gadolinium belongs to 4f-series, atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

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Question 33. There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

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Question 34. Which of the following trivalent ion has the largest atomic radii in the lanthanide series?

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Question 35. Arrange Ce3+, La3+, Pm3+ and Yb3+ in increasing order of their ionic radii.

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Question 36. Identify the incorrect statement among the following.

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Question 37. More number of oxidation states are exhibited by the actinoids than by lanthanoids. The main reason for this is

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Question 38. The actinoids exhibit more number of oxidation states in general than the lanthanoids. This is bacause

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Question 39. The point of dissimilarity between lanthanides and actinides is (a) three outermost shells are partially filled (b) they show oxidation state of +3(common) (c) they are called inraer transition elements (d) they are radioactive in nature

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Question 40. In context of the lanthanoids, which of the following statements are correct?

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Question 41. The number of d- electrons in Fe2+(Z =26) is not equal to the number of electrons in which one of the following?

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Question 42. Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers).

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Question 43. Magnetic moment 2.84 BM is given by: (Atomic number of Ni =28, Ti =22, Cr =24, Co=27)

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Question 44. Reason of lanthanoid contraction is

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Question 45. KI and CuSO4 solution when mixed, give

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Question 46. A magnetic moment of 1.73 BM will be shown by one among the following.

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Question 47. Identify the correct order of solubility in aqueous medium

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Question 48. Which of the following lanthanoid ions is diamagnetic? (Atomic numbers :Ce=58, Sm=62, Eu=63, Yb=70)

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Question 49. Which of the following statements about the interstitial compounds is incorrect?

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Question 50. Identify the alloy containing a non-metal as a constituent in it.

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