Multiple Choice QuestionsWhich 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]
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
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
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]
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
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]
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.
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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