Transition Elements and Coordination Complexes - s, p and d Block Elements - Life Sciences Previous Year Questions

1

2007 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2007

The geometries of [NiCl₄]^2- and [PdCl₄]^2- respectively are

A

Tetrahedral and square planar

B

Both tetrahedral

C

Both square planar

D

Square planar and tetrahedral

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2

2007 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2007

The complex with crystal field stabilization energy (CFSE) of –0.4 Δ_t is

A

[TiCl₄]

B

[MnCl₄]^2-

C

[CoCl₄]^2-

D

[CuCl₄]^2-

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3

2007 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2007

The species having three unpaired electrons and tetrahedral geometry is

A

[Co(CN)₆]^4-

B

[CoCl₄]^2-

C

[Ni(CN)₄]^2-

D

[NiCl₄]^2-

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4

2008 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2008

Which of the following pairs of complexes will NOT show any ligand field \(d-d\) transitions?

A

\(K_4[Fe(CN)_6]\) and \([Ni(H_2O)_6](NH_4)_2SO_4\)

B

\([Cu(CH_3CN)_4]Cl\) and \(Na_2[CoCl_4]\)

C

\([Cu(CH_3CN)_4]Cl\) and \([Zn(NH_3)_4]Cl_2\)

D

\([Cu(H_2O)_2(NH_3)_4]Cl_2\) and \([Zn(H_2O)_2(NH_3)_4]SO_4\)

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5

2009 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2009

Among the following molecules the one that exhibits only one isomer is

A

\([Fe(H_2O)_5OH]^{2+} \)

B

\(Pt(NH_3)_2Cl_2 \)

C

\([Pt(NH_3)_3Cl]^+ \)

D

\([CoCl_3(NH_3)_3] \)

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6

2010 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2010

The oxidation state of nickel atom in the coordination compound [Ni(NH₃)₄Cl]Cl is

A

-1

B

0

C

+1

D

+2

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7

2011 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2011

According to crystal field theory, the electronic configuration of [Ti(H₂O)₆]³⁺ in the ground state is

A

e₉¹t₂₉⁰

B

t₂₉¹e₉⁰

C

e₉²t₂₉¹

D

t₂₉¹e₉¹

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8

2012 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2012

[FeCl₄]^2- (I), [CoCl₄]^2- (II) and [NiCl₄]^2- (III) are paramagnetic tetrahedral complexes. The order of values of crystal field stabilization energy is

A

I > III > II

B

III > I > II

C

I > II > III

D

II > III > I

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9

2012 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2012

The order of values of spin only magnetic moment is

A

III > II > I

B

III > I > II

C

II > I > III

D

I > II > III

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10

2014 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2014

The complex ion \([Cr(H_2O)_6]^{3+}\) (atomic number of Cr is 24) exhibits

A

slightly distorted octahedral geometry

B

tetragonally elongated octahedral geometry

C

tetragonally compressed octahedral geometry

D

perfect octahedral geometry

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11

2016 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2016

The correct comparison of \( pK_a \)’s of \( [Fe(H_2O)_6]^{3+} \), \( [Fe(H_2O)_6]^{2+} \), \( V_2O_5 \) and \( N_2O_5 \) is

A

\([Fe(H_2O)_6]^{3+} < [Fe(H_2O)_6]^{2+} \) and \(V_2O_5 < N_2O_5 \)

B

\([Fe(H_2O)_6]^{3+} < [Fe(H_2O)_6]^{2+} \) and \(V_2O_5 = N_2O_5 \)

C

\([Fe(H_2O)_6]^{3+} = [Fe(H_2O)_6]^{2+} \) and \(N_2O_5 < V_2O_5 \)

D

\([Fe(H_2O)_6]^{3+} < [Fe(H_2O)_6]^{2+} \) and \(N_2O_5 < V_2O_5 \)

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12

2016 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2016

The crystal field stabilization energy (excluding pairing energy, if any) of \( [CoCl_4]^{2-} \) in \( \Delta_o \) units is ______________.

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13

2019 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2019

A coordination complex Y upon reaction with AgNO₃ solution does NOT give any precipitation. Complex Y possesses two isomers, of which one has zero dipole moment. The crystal field stabilization energy of Y is either -0.8 Δ₀ or -0.8 Δₜ. The magnetic moment for Y is found to be 3.9 Bohr Magneton. The coordination complex Y is

A

[Ti(NH₃)₄(Cl)₂]

B

[Co(NH₃)₄(H₂O)₂]Cl₂

C

[Co(NH₃)₄(Cl)₂]

D

[Co(NH₃)₄(Cl)₂]

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14

2020 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2020

The coordination complex which has a distorted octahedral structure is
(Given: Atomic numbers of V: 23; Mn: 25; Ni: 28; Cu: 29)

A

[Ni(H₂O)₆]²⁺

B

[Mn(H₂O)₆]²⁺

C

[V(H₂O)₆]²⁺

D

[Cu(H₂O)₆]²⁺

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15

2021 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2021

Among the following, the diamagnetic species is(are) (Given: Atomic numbers of Fe = 26, Co = 27, and Ni = 28)

A

[CoF₆]^3-

B

[Ni(H₂O)₆]²⁺

C

[Fe(CN)₆]^4-

D

[Co(NH₃)₆]³⁺

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16

2021 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2021

The total number of possible geometrical isomer(s) for [PtBrCl(NH3)(py)]⁰ is ________. (Given: py = Pyridine and atomic number of Pt = 78)

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17

2021 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2021

The geometry of Fe(CO)5 is
(Given: Atomic number of Fe = 26)

A

pentagonal planar

B

square pyramidal

C

trigonal bipyramidal

D

trigonal pyramidal

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18

2022 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2022

Among the following statements about cobalt complexes, which is/are CORRECT? Given: Atomic number of Co is 27

A

[Co(NH₃)₄]²⁺ exhibits square planar geometry

B

[Co(en)₃]³⁺ does not show optical isomerism (en = ethylenediamine)

C

[Co(H₂O)₆]³⁺ is paramagnetic in nature

D

[Co(NH₃)₅Cl]²⁺ shows ligand-to-metal charge transfer

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19

2023 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2023

Match the coordination complexes given in Column I with the most appropriate properties in Column II.
(Given: Atomic numbers of Mn: 25; Co: 27; Ni: 28)

A

1, F-2, G-3, H-4

B

2, F-1, G-4, H-3

C

4, F-2, G-1, H-3

D

1, F-4, G-3, H-2

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20

2024 · Life Sciences · s, p and d Block Elements · Transition Elements and Coordination Complexes

Life Sciences (XL) 2024

Upon addition of compound X to an aqueous AgNO₃ solution, a white precipitate appears instantly. Also, X does not exhibit geometrical isomerism.
The CORRECT option(s) for X is/are

A

[Cr(OH₂)₃Cl₂]Cl

B

[Cr(OH₂)₃Cl]Cl₂

C

[Cr(OH₂)₆]Cl₃

D

[Cr(OH₂)₅Cl₃]

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