Transition Elements — Part 2 MCQs with Explanations

octahedral is the correct answer to “For the complex ion [Cu(NH 3 ) 6 ] 2+ , the coordination geometry will be”. This question is standard in competitive examination syllabi for Transition Elements.

Cu2+ and Fe2+ is the correct answer to “In biological systems, the metal ions involved in electron transport are”. This question is standard in competitive examination syllabi for Transition Elements.

$$Cr\left( {{H_2}O} \right)_6^{3 + }$$ is the correct answer to “The chromium (III) species formed soon after electron transfer between $$IrCl_6^{2 - }$$ and $$Cr\left( {{H_2}O} \right)_6^{2 + }$$ is”. This question is standard in competitive examination syllabi for Transition Elements.

a di cation is the correct answer to “Structurally nickelocene is similar to ferrocene. Nickelocene attains stability due to the formation of”. This question is standard in competitive examination syllabi for Transition Elements.

0, 1 is the correct answer to “The complexes V(C 6 H 6 ) 2 and Cr(C 6 H 6 ) 2 are both readily oxidized in air to their respective cations. The number of unpaired electrons, respectively in each are”. This question is standard in competitive examination syllabi for Transition Elements.

[PtCl3(η2-C2H4]- is the correct answer to “Zeise's salt is represented as”. This question is standard in competitive examination syllabi for Transition Elements.

Mn$${\text{O}}_4^ - $$ exhibits charge transfer at shortest wavelength among the three is the correct answer to “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”. This question is standard in competitive examination syllabi for Transition Elements.

Cr(C5H5)2 is the correct answer to “The complex which obeys the 18-electron rule is”. This question is standard in competitive examination syllabi for Transition Elements.

Mn is the correct answer to “In photosynthesis, the predominant metal present in the reaction centre of photosystem II is”. This question is standard in competitive examination syllabi for Transition Elements.

Reaction 1 follows inner sphere and reaction 2 follows outer sphere mechanism is the correct answer to “Consider the reactions: 1. [Cr(H 2 O) 6 ] 2+ + [CoCl(NH 3 ) 5 ] 2+ → [Co(NH 3 ) 5 (H 2 O)] 2+ + [CrCl(H 2 O) 5 ] 2+ 2. [Fe(CN) 6 ] 4- + [Mo(CN) 8 ] 3- → [Fe(CN) 6 ] 3- + [Mo(CN) 8 ] 4- Which one of the following is the correct statement”. This question is standard in competitive examination syllabi for Transition Elements.

geometrical isomerism is the correct answer to “The existence of two different coloured complexes of Co(NH 3 ) 4 Cl 2 is due to”. This question is standard in competitive examination syllabi for Transition Elements.

[Ce(NO3)6]2- is the correct answer to “The lanthanide complex (where, acac = acetylacetonate; phen 1, 10-phenanthroline) that do not have square anti prismatic structure is”. This question is standard in competitive examination syllabi for Transition Elements.

[Fe(H2O)6]2+ is the correct answer to “The complex with spin-only magnetic moment of ∼ 4.9 BM is”. This question is standard in competitive examination syllabi for Transition Elements.

$$d_z^2$$ is the correct answer to “In the trigonal bipyramidal crystal field, the d orbital with the highest energy is”. This question is standard in competitive examination syllabi for Transition Elements.

(CH3CO)Mn(CO)4(13CO) is the correct answer to “The product of the reaction between CH 3 Mn(CO) 5 and 13 CO is”. This question is standard in competitive examination syllabi for Transition Elements.

3T1g and 2 is the correct answer to “The spectroscopic ground state symbol and the total number of electronic transitions of [Ti(H 2 O) 6 ] 2+ are”. This question is standard in competitive examination syllabi for Transition Elements.

Mo and Fe is the correct answer to “The metals involved in nitrogenase are”. This question is standard in competitive examination syllabi for Transition Elements.

f orbitals interact less effectively with ligands is the correct answer to “Ligand field stabilization energies are smaller for lanthanides compared to transition metals in the same oxidation state because”. This question is standard in competitive examination syllabi for Transition Elements.

2T2g is the correct answer to “The crystal-field symbol for the ground state of [Mn(CN) 6 ] 4- is”. This question is standard in competitive examination syllabi for Transition Elements.

6 is the correct answer to “The number of metal-metal bonds present in Ir 4 (CO) 12 are”. This question is standard in competitive examination syllabi for Transition Elements.

cis-[PtCl2(NH3)2] is the correct answer to “The reaction of [PtCl 4 ] 2- with NH 3 gives rise to”. This question is standard in competitive examination syllabi for Transition Elements.

CH3 is the correct answer to “[Co(CO) 4 ] is isolobal with”. This question is standard in competitive examination syllabi for Transition Elements.

Zn(ll) forms weak complexes with oxygen donor ligands is the correct answer to “Nature has chosen Zn(ll) ion at the active site of many-hydrolytic enzymes because”. This question is standard in competitive examination syllabi for Transition Elements.

it follows inner sphere mechanism with Cl- acting as the bridging ligand is the correct answer to “[CoCl(NH 3 ) 5 ] 2+ + [Cr(H 2 O) 6 ] 2+ → [Co(H 2 O)(NH 3 ) 5 ] 2+ + [CrCl(H 2 O) 5 ] 2+ The correct statement regarding the above reaction is that”. This question is standard in competitive examination syllabi for Transition Elements.

Cu is the correct answer to “In biological systems, the metal ion involved in the di-oxygen transport besides Fe is”. This question is standard in competitive examination syllabi for Transition Elements.

Ni(CO)4 is the correct answer to “The compound which shows L ← M charge transfer is”. This question is standard in competitive examination syllabi for Transition Elements.

outer sphere electron transfer is the correct answer to “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”. This question is standard in competitive examination syllabi for Transition Elements.

Cu(II), Low-spin Fe(III), Ti(II) is the correct answer to “The set of ions expected to show John-Teller distortion in their complexes is”. This question is standard in competitive examination syllabi for Transition Elements.