12th Standard Syllabus & Materials

12th Standard

TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

12th Standard Chemistry English Medium - Coordination Chemistry 1 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 01/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - Coordination Chemistry, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions + Answers key

Take MCQ Chemistry Test

QB365 Student Learing Managemnet System

Std: 12th Standard - Chemistry

chapter: - Model Question paper

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Multiple Choice Question

20 x 1 = 20

Choose the correct statement.

(a)

Square planar complexes are more stable than octahedral complexes

(b)

The spin only magnetic moment of [Cu(Cl)₄]^2- is BM and it has square planar structure.

(c)

Crystal field splitting energy \(\left( { \Delta }_{ 0 } \right) \) [FeF₆]^4- is higher than the \((\Delta _{ 0 })\) of [Fe(CN)₆]^4-

(d)

crystal field stabilization energy of [V(H₂O)₆]²⁺ is higher than the crystal field stabilization of [Ti(H₂O)₆]²⁺

Fac-mer isomerism is shown by _______.

(a)

[CO(en)₃]³⁺

(b)

[Co(NH₃)₄(Cl)₂]⁺

(c)

[Co(NH₃)₃(Cl)₃]

(d)

[Co(NH₃)₅Cl]SO₄

Which of the following is paramagnetic in nature?

(a)

[Zn(NH₃)₄]²⁺

(b)

[Co(NH₃)₆]³⁺

(c)

[Ni(H₂O)₆]²⁺

(d)

[Ni(CN)₄]^2-

Formula of tris(ethane-1, 2-diamine)iron(II)phosphate _______.

(a)

[Fe(CH₃-CH(NH₂)₂)₃](PO₄)₃

(b)

[Fe(H₂N-CH₂-CH₂-NH₂)₃](PO₄)

(c)

[Fe(H₂N-CH₂-CH₂-NH₂)₃](PO₄)₂

(d)

[Fe(H₂N-CH₂-CH₂-NH₂)₃]₃(PO₄)₂

A complex in which the oxidation number of the metal is zero is_______.

(a)

K₄[Fe(CN)₆]

(b)

[Fe(CN)₃(NH₃)₃]

(c)

[Fe(CO)₅]

(d)

both (b) and (c)

Which one of the following complexes is not expected to exhibit isomerism?

(a)

[Ni(NH₃)₄(H₂O)₂]²⁺

(b)

[Pt(NH₃)₂Cl₂]

(c)

[Co(NH₃)₅SO₄]Cl

(d)

[FeCl₆]^3-

Which kind of isomerism is possible for a complex [Co(NH₃)₄Br₂]CI?

(a)

geometrical and ionization

(b)

geometrical and optical

(c)

optical and ionization

(d)

geometrical only

Which one of the following pairs represents linkage isomers?

(a)

[Cu(NH₃)₄][PtCl₄] and [Pt(NH₃)₄][CuCl₄]

(b)

[Co(NH₃)₅(NO₃)]SO₄ and [Co(NH₃)₅(ONO)]

(c)

[Co(NH₃)₄(NCS)₂]Cl and [Co(NH₃)₄(SCN)₂]Cl

(d)

both (b) and (c)

How many geometrical isomers are possible for [Pt(Py)(NH₃)(Br)(Cl)]?

(a)

(b)

(c)

(d)

10.

Which type of isomerism is exhibited by [Pt(NH₃)₂Cl₂]?

(a)

Coordination isomerism

(b)

Linkage isomerism

(c)

Optical isomerism

(d)

Geometrical isomerism

11.

Which one of the following will give a pair of enantiomorphs?

(a)

[Cr(NH₃)₆][Co(CN)₆]

(b)

[Co(en)₂Cl₂]Cl

(c)

[Pt(NH₃)₄][PtCl₄]

(d)

[Co(NH₃)₄Cl₂]NO₂

12.

In which of the following coordination entities the magnitude of Δ₀ will be maximum?

(a)

[Co(CN)₆]^3-

(b)

[Co(C₂O₄)₃]^3-

(c)

[Co(H₂O)₆]³⁺

(d)

[Co(NH₃)₆]³⁺

13.

Crystal field stabilization energy for high spin d⁵ octahedral complex is _______.

(a)

-0.6\({ \Delta }_{ 0 }\)

(b)

(c)

2(P-\({ \Delta }_{ 0 }\))

(d)

2(P+\({ \Delta }_{ 0 }\))

14.

A magnetic moment of 1.73BM will be shown by one among the following.

(a)

TiCl₄

(b)

[CoCl₆]^4-

(c)

[Cu(NH₃)₄]²⁺

(d)

[Ni(CN)₄]^2-

15.

IUPAC name of the complex K₃[Al(C₂O₄)₃] is _______.

(a)

potassium trioxalatoaluminium (III)

(b)

possium trioxalatoaluminate (II)

(c)

potassium trisoxalatoaluminate (III)

(d)

potassium trioxalatoaluminate (III)

16.

As per IUPAC guidelines, the name of the complex [Co(en)₂(ONO)Cl]Cl is _______.

(a)

chloro bis ethylenediamine nitrocobalt(III) chloride

(b)

chloridobis(ethane-1, 2-diamine)nitro K-O Cobaltate(III) chloride

(c)

chloridobis(ethane-1, 2-diammine)nitrito K-O Cobalt(II) chloride

(d)

chloridobis(ethane-1, 2-diamine)nitrito K-O Cobalt(III) chloride

17.

Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.

(a)

+2 and 0 respectively

(b)

+3 and 0 respectively

(c)

+3 and -1 respectively

(d)

+1 and +1 respectively

18.

A complex has a molecular formula MSO₄Cl.6H₂O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?

(a)

[M(H₂O)₄Cl]SO₄.2H₂O

(b)

[M(H₂O)₆]SO₄

(c)

[M(H₂O)₅Cl]SO₄.H₂O

(d)

[M(H₂O)₃Cl]SO₄.3H₂O

19.

An excess of silver nitrate is added to 100ml of a 0.01M solution of Pentaaquachlorochromium (III)chloride. The number of moles of AgCl precipitated would be _______.

(a)

0.02

(b)

0.002

(c)

0.01

(d)

0.2

20.

The sum of primary valence and secondary valence of the metal M in the complex [M(en)₂(Ox)]Cl is________.

(a)

(b)

(c)

-3

(d)

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Multiple Choice Question

20 x 1 = 20

(d)
crystal field stabilization energy of [V(H₂O)₆]²⁺ is higher than the crystal field stabilization of [Ti(H₂O)₆]²⁺

a) Zn²⁺ (d¹⁰ ⇒ diamagnetic)
b) Co³⁺ (d⁶ Low spain ⇒ t_2g⁶ e⁰_g ; diamagnetic)
c) Ni²⁺ (d⁸ Low spain ⇒ t_2g⁶ e²_g ; paramagnetic)
d) [Ni(CN)₄]²⁺ (dsp² ; square planar, diamagnetic)

[Fe(H₂N-CH₂-CH₂-NH₂)₃]₃(PO₄)₂
[Fe(en)₃]²⁺(\(PO_{4}^{3-}\))

a) Fe²⁺ b) Fe³⁺ c) Fe⁰

Option (a) and (b) -geometrical isomerism is possible
Option (c) - ionization isomerism is possible
Option (d) - no possibility to show either constitutional isomerism or stereo isomerism

For [MA₄B₂]⁴⁺ complexes - geometrical isomerism is possible
{[Co(NH₃)₄Br₂]CI,[Co(NH₃)₄Br CI]Br} - ionisation isomers

(a) coordination isomers
(b) no isomerism ( different molecular formula)
(c)⬅NCS; ⬅SCN coordinating atom differs : linkage isomers

Three isomers. If we consider any one of the ligands as reference (say Py), the arrangement of other three ligands (NH₃, Br^- and Cl^-) with respect to (Py) gives three geometrical isomers.

10.

11.

Complexes given in other options (a), (c) and (d) have symmetry elements and hence they are optically inactive.

12.

In all the complexes, the central metal ion is Co³⁺, among the given ligands CN^- is the strongest ligand, which causes large crystal
field splitting i.e maximum Δ₀

13.

The electronic configuration t_2g³, e²_g
[ 3 x (-0.4)+ 2(0.6)]Δ₀
[-1.2 + 1.2] Δ₀ = 0

14.

Ti⁴⁺ (d⁰ ⇒ 0BM)
Co²⁺ (d⁷ spain free ⇒ t_2g⁵, e²_g;n = 3; μ = 3.9BM)
Cu²⁺ (d⁹ Low spain ⇒ t_2g⁶, e³_g; n = 1; μ = 1.732BM)
Ni²⁺ (d⁸ Low spain ⇒ t_2g⁶, e²_g;n = 2; μ = 2.44 BM)

15.

(d)
potassium trioxalatoaluminate (III)

16.

(d)
chloridobis(ethane-1, 2-diamine)nitrito K-O Cobalt(III) chloride

17.

[\( \overset{+}{Fe}\)(H₂O)₅\( \overset{+}{NO}\)]²⁺ SO^2-₄
+1 and +1 respectively

18.

Molecular formula: MSO₄Cl.6H₂O
Formation of white precipitate with Barium chloride indicates that SO^2-₄ ions are outside the coordination sphere, and no precipitate with AgNO₃ solution indicates that the Cl^- ions are inside the coordination sphere. Since the coordination number of M is 6.Cl^- and 5 H₂O are ligands, remaining 1 H₂O molecular and SO^2-₄ are in the outer coordination sphere.

19.

The complex is [M(H₂O)₅Cl]Cl₂
1000 ml of 1 M solution of the complex gives 2 moles of Cl^- ions 1000 ml of 0.01 M solution of the complex will give
\(\frac{100 ml \times 0.01M \times 2Cl^-}{1000 ml \times 1M}\)
= 0.002 moles of Cl^- ions

20.

In the complex [M(en)₂(Ox)]Cl For the central metal ion M3+
The primary valence is = +3
The secondary valence = 6
sum of primary valence and secondary valence = 3 + 6 = 9