Which of the following metal ions has a calculated magnetic momen

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 Multiple Choice QuestionsMultiple Choice Questions

161.

Which one of the following does not exhibit geometrical isomerism?

  • Octahedral complex with formula [MX2L4]

  • Square planar complex with formula [MX2L2]

  • Tetrahedral complex with formula [MAB XL]

  • Octahedral complex with formula [MX2(L -L)2]


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162.

Which of the following metal ions has a calculated magnetic moment value of ✓24. BM?

  • Mn2+

  • Fe2+

  • Fe3+

  • Co2+


B.

Fe2+

We know that, magnetic moment (μ) is related to number of unpaired electrons 'n' as μeff = √n(n+2) BM

 μeff = √24 BM

This corresponds, n= 4as  μeff = √4(4+2) = √24

                    = 2.√2.√3

                   = 2× 1.414 ×1.732 = 4.89BM

(Trick =Number of unpaired e- are equal to value of variable numberof BM)

Out of given options, Fe2+ has 4 unpaired electrons as

  


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163.

The pair of metal carbonyl complexes that are isoelectronic is

  • Ni(CO)4 and V(CO)6

  • [Cr(CO)6] and V(CO)6

  • [Fe(CO)4]- and Cr(CO)6

  • [Co(CO)4]- and Ni(CO)4


164.

The following ligand is

  • tetradentate

  • bidentate

  • hexadentate

  • tridentate


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165.

The compound that inhibits the growth of tumors is:

  • trans-[Pt(Cl)2(NH3)2]

  • trans-[Pd(Cl)2(NH3)2]

  • cis-[Pd(Cl)2(NH3)2]

  • cis-[Pt(Cl)2(NH3)2]


166.

The calculated spin–only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2 and [Fe(CN)6], respectively, are :

  • 4.9 and 0

  • 2.84 and 5.92

  • 0 and 5.92

  • 0 and 4.9


167.

The number of water molecules not coordinated to copper ion directly in CuSO4.5H2O is

  • 2

  • 3

  • 1

  • 4


168.

The species that can have a trams-isomer (en=ethane-1,2-diamine,ox=oxalate)

  • [Cr(en)2(ox)]+

  • [Pr(en)2Cl2]2+

  • [Zn(en)Cl2]

  • [Pt(en)Cl2]


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169.

The INCORRECT statement is :

  • The gemstoe, ruby has Cr3+ ions occupying the octahedral sites of beryl

  • The spin – only magnetic moments of [Fe(H2O)6]2+ and [Cr(H2O)6]2+ are nearly similar.

  • The color of [CoCl(NH3)5]2+ is violet as it absorbs the yellow light.

  • The spin only – magnetic moment of [Ni(NH3)4(H2O2)]2+ is 2.83 BM.


170.

The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4], respectively are:

  • -2.4 Δ0 and -1.2Δt

  • -0.4 Δ0 and -1.2Δt

  • -0.6 Δ0 and -0.8Δt

  • -0.4 Δ0 and -0.8Δt


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