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Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O413. Gadolinium belongs to 4f series. It's atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?14. The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr3+ ion is ______ .15. Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds ?16. KMnO4 acts as an oxidising agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidised to ______ .17. Which of the following statements is not correct?18. When acidified K2Cr2O7 solution is added to Sn2+ salts then Sn2+ changes to ______ .19. Highest oxidation state of manganese in fluoride (MnF4) is (+4) but highest oxidation state in oxides (Mn2O7) is (+7) because _____.20. Although zirconium belongs to 4d transition series and hafnium to 5d transition series even then they show similar physical and chemical properties because ______ .21. Why is HCl not used to make the medium acidic in oxidation reactions of KMnO4 in acidic medium?1. The elements whose ground state or any of its oxidation states is incompletely filled by

4d- orbital electrons, are called elements of which transition series?2. Which element of third transition elements is not considered as transition element?3. How many groups are included in d-block?4. The elements which in their ground-state or any one of its oxidation state, have incompletely filled d-orbitals with electrons are called:5. Which of the following is not considered transition element? 6. What is the general electronic configuration of transition elements?7. Which element of the following not considered as transition element? 8. Elements of which groups are called d-block element? 9. Which sets are the transitions elements?10. Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is: 11. Which of the following are d-block elements but not regarded as transition elements? 12. Zn and Cd do not show variable valency, because:13. What is the name of element X by the following electronic configuration X = [Ar] 3d104s1?14. Electronic structure of ________ is 3d3 4s0. 15. Which ion has 5.93 BM magnetic moment? 16. Which of the following is not an interstitial compound? 17. Transition metals and their compounds contain catalytic property, because________ .18. What is responsible from the following for inner transition elements having +3 stable oxidation state?19. Which element shows minimum paramagnetism?20. Which ion of the following contains minimum magnetic moment?21. What is the general characteristic property of transition elements?22. What is the change in ionization energy while going from left to right in first transition elements? 23. Which ion of 3d-orbital in transition series contains maximum magnetic moment?24. Which ion from the following contain magnetic moment same as Co3+ ion?25. Laws of Hume and Rothery are associated with formation of which of the following? 26. Which catalyst is used in Haber's process for industrial production of NH3? 27. Which of the following metal containing liquid form?28. Which non-metallic elements does not make interstitial compound? 29. Which statement is incorrect for transition metallic elements? 30. Transition elements containing higher oxidation number possess ________ property. 31. What is the formula to calculate magnetic moment? 32. The voids of interstitial compounds present

in ________ .33. Which ion from the following contains diamagnetic property? 34. Which metal does not contains more than one oxidation state? 35. The difference between two atomic radii should not be more than ________ to form an alloy. 36. The value of magnetic moment increases as ________ number increases. 37. Which of the following compounds is diamagnetic ? 38. Whose aqueous solution is colourless? 39. Transition metallic elements behaves as reducing agent because ________ .40. Which of the following descending order of second ionization enthalpy? 41. What will be the correct order of theoretical magnetic moment (in BM unit) of Mn2+, Cr2+, and V2+? 42. In contact process manufacture of H2SO4 which catalyst is used to form SO3 from SO2? 43. Which ionic pair from the following is coloured in aqueous solution? 44. Mention the number of d-electrons in Fe2+ (Z = 26).45. Which is the third element except Ni and Zn in German silver alloy? 46. Which alloy does not contain Ni metal? 47. Which of the following reason is not correct for formation of complex compounds of transition metal ions? 48. What will be the correct order theoretical magnetic moment of Cr3+, Mn2+ and Fe3+ having magnetic moment x, y and z in BM unit respectively? 49. Which of the following statements about the interstitial compounds is incorrect? 50. In which of the following ion d-d transition is not possible? 51. The theoretical magnetic moment of 27Co is 3.87 BM. Which one is the correct compound from the following?52. What is the experimental value of magnetic moment of metal ion on [Fe(CN)6]4–? 53. For the tetrahedral complex [MnBr4]2– the spin only magnetic moment value is ______ .

[Atomic no. of Mn = 25] 54. Which of the following is colourless? 55. Highest oxidation state (+7) is shown by: 56. Transition elements are coloured because: 57. Which of the following set has all the coloured ion?58. The catalytic activity of the transition metal and their compound is ascribed to their _____.59. Which one of the following sets correctly represents the increase in the paramagnetic property of the ions? 60. Transition metals in their compounds show: 61. Which of the following metal ions is not coloured? 62. Which of the following forms interstitial compounds? 63. The properties of Zr and Hf are similar because;64. Number of electrons transferred in each case when KMnO4 acts as an oxidising agent to give MnO2, Mn2+, Mn(OH)3 and MnO2–4, are respectively.65. Which shows a jump in second ionization potential?66. Number of electrons in 3d-orbital V2+, Cr2+, Mn2+ and Fe2+ are 3, 4, 5 and 6 respectively. Which of the following ions will have largest value of magnetic moment (m)? 67. Which metal has the highest melting point? 68. Non-stoichiometric compounds are formed by: 69. d-block elements generally form: 70. Which has the lowest melting point? 71. The most stable ion is: 72. Identify the correct order of ionic radii. 73. Which elements in first transition series has maximum third ionization enthalpy? 74. Which element in 3d series does not exhibit variable oxidation states? 75. The element with positive reduction potential in 3d series is ________ .76. Which of the following is diamagnetic? 77. Which of the following has highest magnetic moment? 78. What is the oxidation number of Ti, whose magnetic moment is 1.73 BM? 79. Which metal does not contain more than one oxidation state? 80. Which is least stable in aqueous medium? 81. Which of the following ion has the maximum theoretical magnetic moment? 82. The correct order of catalytic properties of Cr, V, Fe and Mn metals in increasing order is ______ . 83. What is the colour of potassium per manganate (KMnO4)? 84. What is the colour of potassium manganate (K2MnO4)?85. What will be the product and its colour when MnO2 reacts with KOH in presence of air? 86. In which compound Mn possesses maximum oxidation state? 87. Which compound is used as an oxidizing agent in acidic, basic and in neutral medium?88. What is the colour of crystals of potassium dichromate? 89. What is the formula of chromite? 90. Which of the following properties is possessed by KMnO4? 91. Which ion converts ferrous ion into ferric ion in acidic medium? 92. The colour of KMnO4 is due to ________. 93. Which one of the following ions exhibits d-d transition and paramagnetism as well?94. What is obtained by the oxidation I– with MnO4– in alkaline solution? 95. The basic character of the transition metal oxides follow the order ________. 96. Find basic oxides from the followings: (1) Mn2O7 (2) V2O3 (3) V2O5 (4) CrO (5) Cr2O397. Which statement is not suitable for interstitial compound?98. Which of the following statement is incorrect for KMnO4?99. Identify the correct order of oxidizing strength:100. What is equivalent weight of K2Cr2O7 in acidic medium, if its molecular weight is taken as "M"?101. Which of the following undergoes disproportionation reaction?102. What is the structure of chromate ion?103. What is chemical formula of pyrolusite? 104. What is oxidation number of Mn in KMnO4?105. Which of the following compounds has colour but no unpaired electrons?106. In chromate ore, the oxidation number of iron and chromium are respectively:107. When KMnO4 reacts with acidified FeSO4:108. The pair of amphoteric oxides is ________ . 109. The number of unpaired electrons in 28Ni is:110. Why KMnO4 is of purple colour?111. In presence of acidic medium KMnO4 converts H2S into ________.112. In acidic medium, which of the following becomes colourless?113. Which block elements are called inner

transition?114. Which of the following elements are included in lanthanide series?115. What valency of all lanthanide series elements?116. Which of the following statements is incorrect?117. Which type of hydroxides are formed by lanthanoids?118. Which oxides are formed by lanthanoids?119. Which elements is radioactive among lanthanoid elements?120. Inner transition elements are of which periods?121. Zr and Hf have almost equal atomic size because ________ .122. Identify perfect order of ionic radii.123. Which of the following is most basic?124. Which of the following is strongest base?125. Which of the following lanthanoid has smallest atomic radius?126. Which of the following is lanthanoid element?127. Which of the following trivalent ions is colourless?128. Which of the following element have half filled f-orbital?129. Which of the following statement is incorrect?130. Across the lanthanide series, the basicity of lanthanoid hydroxides.131. Lanthanoids are:132. Lanthanoid contraction occurs because;133. Which among the following elements is radioactive? 134. Which of the following statement is correct?135. Which maximum oxidation state possesses by actinoides?136. Lanthanoid and actinoids resembles in _____ .137. What is used in dry cell?138. What is the percentage of iron in pyrophoric alloy?139. Which is used in the stone of gas lighter?140. Which compounds of lanthanoids are used in pigments?141. What in used in thermometer?142. Which of the following substance is used in measurement of Chemical Oxygen Demand (COD) in polluted water?143. Assertion : Co (IV) is known, but Ni (IV) is not. Reason : Ni (IV) has a d4 electronic configuration.144. Assertion : Transition metals are strong reducing agents. Reason : Transition metals form intermetallic alloys with other elements.145. Assertion : KMnO4 is stored in deep purple bottles. Reason : Heating KMnO4 with alkali converts it into manganate.146. Assertion : Eu2+ is more stable than Ce2+. Reason : Eu2+ has a half-filled 4f-orbital and an empty 5d-orbital, which increases its stability.147. Assertion : Ce4+ is a good analytical reagent. Reason : Ce4+ has a tendency to change into Ce3+.148. Assertion : In acidic medium, Cr+6 exists as a strong oxidising agent in the form of chromate, whereas MoO3 and WO3 are not strong oxidising agent. Reason : Heavy elements in the d-block tend to show higher oxidation states.149. Assertion : Zn, Hg, and Cd are not considered transition elements. Reason : The electron configuration of Zn, Hg, and Cd is represented by the formula (n–1)d10 ns2.150. Assertion : Cr2+ undergoes reduction, and Mn3+ undergoes oxidation. Reason : Cr2+ and Mn3+ have d4 and d5 electron configuration respectively.151. Assertion : Cu dissolves in dilute HNO3 but not in dilute HCl. Reason : The standard electrode potential (E°) of Cu is positive.152. Assertion : Fe+3 catalyzes the reaction between iodide and persulfate ions. Reason : Transition metal act as catalyst.153. Assertion : In transition elements, the radii of the 5d series are almost equal to the corresponding members of the 4d series. Reason : The filling of 4f-orbitals before

5d-orbitals causes a regular decrease in atomic radii.154. Assertion : Among the elements from Sc to Zn, Zn has the lowest atomic ionization enthalpy. Reason : Zinc has a greater number of unpaired electrons in its electronic configuration.155. Assertion : Zr and Hf are similar in nature and difficult to separate. Reason : Due to lanthanide contraction, Zr and Hf have similar radii.156. Assertion : Copper (II) iodide is not known. Reason : Cu2+ oxidizes I– to I2.157. Assertion : The magnetic moment of Mn2+ is lower than that of Cr2+. Reason : The higher the atomic number, the lower the magnetic moment.158. Assertion : In chromium compounds, the maximum oxidation state of chromium is +6. Reason : Chromium has only six electrons in the ns and (n–1)d-orbitals.159. Assertion : In an acidic medium, K2Cr2O7 is orange in colour, while in a basic medium it converts CrO2−4 (yellow). Reason : K2Cr2O7 is hygroscopic in nature and reacts with water to change its colour.160. Assertion : The ability of oxygen to stabilize higher oxidation states exceeds that of fluorine. Reason : The highest oxidation state in oxides corresponds to the group number.161. Assertion : KMnO4 acts as an oxidizing agent in acidic, basic, or neutral media. Reason : KMnO4 oxidizes ferrous sulfate to ferric sulfate.162. Assertion : The atomic radii of Zr and Hf are nearly the same. Reason : Zr and Hf belong to the same group.163. Assertion : Ce4+ acts as an oxidizing agent in aqueous medium. Reason : The +4 oxidation state is common in lanthanoids.164. Assertion : Hg is the only metal that is liquid at 0°C. Reason : This is due to its very high ionization energy and weak metallic bonding.165. Assertion : The solution of Na2CrO4 in water is coloured. Reason : In Na2CrO4, the oxidation state of Cr is +6.166. Assertion : The melting point of Mn is lower than that of Fe. Reason : Mn has fewer unpaired electrons compared to Fe, making its atomic bonding weaker.167. Assertion : The coordination number of transition elements is variable. Reason : The energy of the ns and (n–1) d-orbitals is similar.168. Assertion : La2O3 is basic in nature. Reason : La forms La(OH)3 in an aqueous solution.169. Assertion : All compounds containing lanthanoid elements typically exhibit +3 oxidation state. Reason : Lanthanoid elements have three electrons in their outermost shell.170. Assertion : Eu2+ and Yb2+ ions act as reducing agents. Reason : Both ions possess a stable half-filled electron configuration.171. Assertion : Neptunium is a transuranic element. Reason : It is heavier than uranium.172. Assertion : The second ionization enthalpy of chromium is higher than that of its neighbouring elements. Reason : After removing one electron from chromium, it attains the stable electron configuration [Ar]3d5, making the removal of the second electron require more energy.173. Assertion : When ions are formed from the first transition series elements, the electrons from the 4s-orbital are removed before those from the 3d-orbital. Reason : The attractive force towards the nucleus is stronger for the electrons in the 4s-orbital than for those in the 3d-orbital.

(A) H2SO4    (B) KMnO4    (C) (D)    (D) K2Cr2O7

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//M1//QN2//MCQ//DL0

Choose the correct option for the statements with T (True) and F (False) indicators: (i) Mercury is not considered a transition element because it is liquid. (ii) K2Cr2O7 is a coloured compound because d-d transitions are possible in it. (iii) CuCl2–4 is known, but CuI2–4 is not known. (iv) Mn2O3 is acidic, while Mn2O7 is basic.

(A) FTTF    (B) FFFF    (C) TTTT    (D) FTFF

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//M1//QN3//MCQ//DL0

Choose the correct option for the statements with T (True) and F (False) indicators: (i) In octahedral complexes, the stability of Co3+ is higher. (ii) Zinc forms coloured complexes. (iii) Most of the d-block elements and their compounds are ferromagnetic. (iv) In acidic medium, Cr+6 exists as dichromate and is a strong oxidizing agent.

(A) TFTF    (B) TFFT    (C) FTTF    (D) TFFF

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//M1//QN4//MCQ//DL0

Choose the correct T (True) or F (False) for the following statements: (i) All Cr–O bonds in Cr2O2–7 are identical. (ii) CrO2–4 has a tetrahedral structure. (iii) Fe, Co, and Ni are collectively known as ferrous metals. (iv) In acidic K2Cr2O7, reaction with Sn2+ forms Sn4+.

(A) FTTT    (B) TFFT    (C) TFTF    (D) FTFT

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//M1//QN5//MCQ//DL0

Choose the correct T (True) or F (False) for the following statements: (i) The stability of transition metal ions is low in aqueous medium. (ii) The magnetic moment of CoCl3 is 4.90 BM. (iii) Samarium is as hard as steel. (iv) Gadolinium has maximum paramagnetism.

(A) FTTF    (B) FTTT    (C) TFTF    (D) FTFT

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