Transition Elements MCQ

Test your knowledge with important Transition Elements MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Transition Elements MCQs at Bissoy

• The set of ions expected to show John-Teller distortion in their complexes is
  ক

  Ti(III), Cu(II), High-spin Fe(III)

  খ

  Cu(I), Ni(II), High-spin Fe(III)

  গ

  Cu(II), Low-spin Fe(III), Ti(II)

  ঘ

  Low-spin Fe(III), Mn(II), Cu(I)
• Electron transfer from $$Fe\left( {{H_2}O} \right)_6^{2 + }$$   to $$Fe\left( {{H_2}O} \right)_6^{3 + }$$   is likely to occur via
  ক

  d-d transitions

  খ

  inner sphere electron transfer

  গ

  S_N1 mechanism

  ঘ

  outer sphere electron transfer
• The compound which shows L ← M charge transfer is
  ক

  Ni(CO)₄

  খ

  K₂Cr₂O₇

  গ

  HgO

  ঘ

  ²⁺
• In biological systems, the metal ion involved in the di-oxygen transport besides Fe is
  ক

  Co

  খ

  Zn

  গ

  Mg

  ঘ

  Cu
• Nature has chosen Zn(ll) ion at the active site of many-hydrolytic enzymes because
  ক

  Zn(II) is a poor Lewis acid

  খ

  Zn(ll) does not have chemically accessible redox states

  গ

  Zn(ll) forms both four and higher coordination complexes

  ঘ

  Zn(ll) forms weak complexes with oxygen donor ligands
• The number of metal-metal bonds present in Ir₄(CO)₁₂ are
  ক

  4

  খ

  5

  গ

  6

  ঘ

  8
• Ligand field stabilization energies are smaller for lanthanides compared to transition metals in the same oxidation state because
  ক

  size of lanthanide ions are larger

  খ

  f orbitals interact less effectively with ligands

  গ

  size of lanthanide ions are smaller

  ঘ

  lanthanides favour oxygen donor ligands
• The metals involved in nitrogenase are
  ক

  Fe and Mg

  খ

  Mo and K

  গ

  Mo and Fe

  ঘ

  Fe and K
• The product of the reaction between CH₃Mn(CO)₅ and ¹³CO is
  ক

  (C$${\text{H}}_3^{13}$$ CO)Mn(CO)⁵

  খ

  (CH₃CO)Mn(CO)₄(¹³CO)

  গ

  (¹³CH₃CO)Mn(CO)₅

  ঘ

  CH₃Mn(CO)₄
• In the trigonal bipyramidal crystal field, the d orbital with the highest energy is
  ক

  d_xy

  খ

  $$d_{{x^2} - {y^2}}^2$$

  গ

  d_yz

  ঘ

  $$d_z^2$$
• The complex with spin-only magnetic moment of ∼ 4.9 BM is
  ক

  ²⁺

  খ

  ^3-

  গ

  ^4-

  ঘ

  ³⁺
• The lanthanide complex (where, acac = acetylacetonate; phen 1, 10-phenanthroline) that do not have square anti prismatic structure is
  ক

  ^2-
• The existence of two different coloured complexes of Co(NH₃)₄Cl₂ is due to
  ক

  optical isomerism

  খ

  linkage isomerism

  গ

  geometrical isomerism

  ঘ

  coordination isomerism
• In photosynthesis, the predominant metal present in the reaction centre of photosystem II is
  ক

  Zn

  খ

  Cu

  গ

  Mn

  ঘ

  Fe
• The complex which obeys the 18-electron rule is
  ক

  Fe(CO)₄

  খ

  Ni(CO)₃(PPh₃)

  গ

  Cr(CO)₅

  ঘ

  Cr(C₅H₅)₂
• In the isoelectronic series, V$${\text{O}}_4^{3 - }$$, Cr$${\text{O}}_4^{2 - }$$ and Mn$${\text{O}}_4^ - $$, all members have intense charge transfer (CT) transitions. The incorrect statement is
  ক

  CT transitions are attributed to excitations of electrons from ligand (σ) to metal (e)

  খ

  Mn$${\text{O}}_4^ - $$ exhibits charge transfer at shortest wavelength among the three

  গ

  The wavelengths of transitions· increase in the order V$${\text{O}}_4^{3 - }$$

  ঘ

  The charge on metal nucleus increases in the order V$${\text{O}}_4^{3 - }$$
• Zeise's salt is represented as
  ক

  H₂PtCl₆

  খ

  ^2-

  গ

  ^2-

  ঘ

  ^-
• The complexes V(C₆H₆)₂ and Cr(C₆H₆)₂ are both readily oxidized in air to their respective cations. The number of unpaired electrons, respectively in each are
  ক

  0, 0

  খ

  1, 0

  গ

  0, 1

  ঘ

  1, 1
• Structurally nickelocene is similar to ferrocene. Nickelocene attains stability due to the formation of
  ক

  a mono cation

  খ

  a di cation

  গ

  a mono anion

  ঘ

  a di anion
• The chromium (III) species formed soon after electron transfer between $$IrCl_6^{2 - }$$  and $$Cr\left( {{H_2}O} \right)_6^{2 + }$$  is
  ক

  $$Cr\left( {{H_2}O} \right)_6^{3 + }$$

  খ

  $$Cr{\left( {{H_2}O} \right)_5}C{l^{2 + }}$$

  গ

  $$CrCl_6^{2 - }$$

  ঘ

  $$Cr{\left( {{H_2}O} \right)_3}C{l_3}$$
• In biological systems, the metal ions involved in electron transport are
  ক

  Na⁺ and K⁺

  খ

  Zn²⁺ and Mg²⁺

  গ

  Ca²⁺ and Mg²⁺

  ঘ

  Cu²⁺ and Fe²⁺
• Metal-metal quadruple bonds are well known for the metal
  ক

  Ni

  খ

  Co

  গ

  Fe

  ঘ

  Re
• Iron-sulphur clusters in biological systems are involved in
  ক

  proton transfer

  খ

  atom transfer

  গ

  group transfer

  ঘ

  electron transfer
• The catalyst used in the conversion of ethylene to acetaldehyde using Wacker process is
  ক

  HCo(CO)₄

  খ

  ^2-

  গ

  V₂O₅

  ঘ

  TiCl₄ in the presence of Al(C₂H₅)₃
• The increasing order of wavelength of absorption for the complex ions<br>i. [Cr(NH₃)₆
  ক

  ³⁺<br>ii. ^3-<br>iii. ³⁺<br>iv. ^3-<br>is

  খ

  <p><span>A. iv <p><span>B. iv

  গ

  iv

  ঘ

  ii
• The compound which has four metal-metal blonds is
  ক

  Fe₂(CO)₉

  খ

  Co₂(CO)₈

  গ

  ^2-

  ঘ

  Ru₃(CO)₁₂
• Arrange the following metal complexes in order of their increasing hydration energy<br>
  ক

  [ <table class="table-style-1"> <tr> <td>²⁺</td> <td>²⁺</td> <td>²⁺</td> <td>²⁺</td> </tr> <tr> <td>P</td> <td>Q</td> <td>R</td> <td>S</td> </tr></table> <p><span>A. P <p><span>B. P

  খ

  Q

  গ

  S
• The octahedral complex/complex ion which shows both facial and meridional isomers is
  ক

  triglycinato cobalt (III)

  খ

  tris (ethylene diamine) cobalt (III)

  গ

  dichloro diglycinato cobalt (III)

  ঘ

  trioxalate cobaltate (III)
• John-Teller distortion of CuSO₄ · 5H₂O acts to
  ক

  raise symmetry

  খ

  remove an electronic degeneracy

  গ

  cause loss of H₂O ligand

  ঘ

  promote a d-electron to an anti bonding molecular orbital
• Among the following pair of metal ions present in nature, the first one functions as an electron transfer agent and the second one catalyzes the hydrolysis reactions. The correct pair is
  ক

  Fe and Zn

  খ

  Mg and Fe

  গ

  Co and Mo

  ঘ

  Ca and Cu