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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 13/10/2020
12th Standard Chemistry Coordination Chemistry English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
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.
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1.
An example of a complex compound having coordination number 4 _______.
K4[Fe(CN)6]
[Co(en)3]Cl
[Fe(H2O)6]Cl3
[Cu(NH3)4]Cl2
2.
Which of the following will exhibit linkage isomerism?
[Co(NH3)5 (NO2)]2+
[Co(H2O)5CO)]3+
[Fe(en)2CI2]+
all the above
3.
Predict the geometry and hybridisation of Fe(Co)5 _______.
Trigonal planar, dsp3
Trigonal bipyramidal, dsp3
Square planar dsp2
Octahedral d2sp3
4.
In Co-ordination compound. [Cr(en)3][CrF6] _______.
ligand is en (ethylenediamine)
Oxidation state of central atom is +3
Central metal is Cr (in anomie complexes)
Cation complex is [Co(NH3)4Cl2]+
5.
Which of these statements about [Co(CN)6]3- is true?
[CO(CN)6]3- has four unpaired electrons and will be in a high spin configuration
[Co(CN)6]3- has four unpaired electrons and will be in a low spin configuration
[CO(CN)6]3- has no unpaired electrons and will be in a high spin configuration
[CO(CN)6]3- has no unpaired electrons and will be in low spin configuration
6.
Ligand which is used to treat hard water _______.
NH3
Ox
en
EDTA
7.
Which of the following is correct statement?
[Ti(H2O)6]3+ is coloured complex
[Sc(H2O)6]3+ is colourless complex
d-d transition is not possible in [Sc(H2O)6]3+ complex
All of these
8.
According to CFT, five d-orbitals of an octahedral complex split to give _______.
One orbital with lower energy and four orbitals with higher energy
Two orbitals with lower energy and three orbitals with higher energy
Three orbitals with lower energy and two orbitals with higher energy
Four orbitals with lower energy and one orbital with higher energy.
9.
Which of the following octahedral complexes do not show geometrical isomerism?
[Co(NH3)3Cl3]
[PtCl2(NH3)4]
[Pt(NH3)2Cl2]
[Co(en)3]3+
10.
Primary and secondary valencies of Cu in [Cu(NH3)4]SO4 is _______.
4,4
2,4
4,1
4,2
11.
An aqueous solution of (PdCI)2 4NH3, when treated with excess of AgNO3 precipitated 2 moles of AgCI. Predict the secondary valency of the compound _______.
2
3
4
6
12.
Choose the correct statement.
Square planar complexes are more stable than octahedral complexes
The spin only magnetic moment of [Cu(Cl)4]2- is BM and it has square planar structure.
Crystal field splitting energy \(\left( { \Delta }_{ 0 } \right) \) [FeF6]4- is higher than the \((\Delta _{ 0 })\) of [Fe(CN)6]4-
crystal field stabilization energy of [V(H2O)6]2+ is higher than the crystal field stabilization of [Ti(H2O)6]2+
13.
Which of the following is paramagnetic in nature?
[Zn(NH3)4]2+
[Co(NH3)6]3+
[Ni(H2O)6]2+
[Ni(CN)4]2-
14.
A complex in which the oxidation number of the metal is zero is_______.
K4[Fe(CN)6]
[Fe(CN)3(NH3)3]
[Fe(CO)5]
both (b) and (c)
15.
Which kind of isomerism is possible for a complex [Co(NH3)4Br2]CI?
geometrical and ionization
geometrical and optical
optical and ionization
geometrical only
16.
How many geometrical isomers are possible for [Pt(Py)(NH3)(Br)(Cl)]
3
4
0
15
17.
Which one of the following will give a pair of enantiomorphs?
[Cr(NH3)6][Co(CN)6]
[Co(en)2Cl2]Cl
[Pt(NH3)4][PtCl4]
[Co(NH3)4Cl2]NO2
18.
Crystal field stabilization energy for high spin d5 octahedral complex is _______.
-0.6\({ \Delta }_{ 0 }\)
0
2(P-\({ \Delta }_{ 0 }\))
2(P+\({ \Delta }_{ 0 }\))
19.
20.
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 _______.
0.02
0.002
0.01
0.2
1.
(d)
[Cu(NH3)4]Cl2
2.
(a)
[Co(NH3)5 (NO2)]2+
3.
(b)
Trigonal bipyramidal, dsp3
4.
(d)
Cation complex is [Co(NH3)4Cl2]+
5.
(d)
[CO(CN)6]3- has no unpaired electrons and will be in low spin configuration
6.
(d)
EDTA
7.
(d)
All of these
8.
(c)
Three orbitals with lower energy and two orbitals with higher energy
9.
(d)
[Co(en)3]3+
10.
(b)
2,4
11.
(c)
4
12.
(d)
crystal field stabilization energy of [V(H2O)6]2+ is higher than the crystal field stabilization of [Ti(H2O)6]2+
13.
a) Zn2+ (d10 ⇒ diamagnetic)
b) Co3+ (d6 Low spain ⇒ t2g6 e0g ; diamagnetic)
c) Ni2+ (d8 Low spain ⇒ t2g6 e2g ; paramagnetic)
d) [Ni(CN)4]2+ (dsp2 ; square planar, diamagnetic)
14.
a) Fe2+ b) Fe3+ c) Fe0
15.
For [MA4B2]4+ complexes - geometrical isomerism is possible
{[Co(NH3)4Br2]CI,[Co(NH3)4Br CI]Br} - ionisation isomers
16.
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.
17.
Complexes given in other options (a), (c) and (d) have symmetry elements and hence they are optically inactive.
18.
The electronic configuration t2g3, e2g
[ 3 x (-0.4)+ 2(0.6)]Δ0
[-1.2 + 1.2] Δ0 = 0
19.
(d)
20.
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
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