Coordination Chemistry Practice Test

12th Standard Chemistry — Coordination Chemistry: Online Practice Test

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The sum of primary valence and secondary valence of the metal M in the complex \([M(en)_2(Ox)]Cl\) is

A.3 B.6 C.-3 D.9

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

A.0.02 B.0.002 C.0.01 D.0.2

A complex has a molecular formula \(MSO_4Cl \cdot 6H_2O\). 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.\([M(H_2O)_4Cl]SO_4 \cdot 2H_2O\) B.\([M(H_2O)_6]SO_4\) C.\([M(H_2O)_5Cl]SO_4 \cdot H_2O\) D.\([M(H_2O)_3Cl]SO_4 \cdot 3H_2O\)

Oxidation state of Iron and the charge on the ligand NO in \([Fe(H_2O)_5NO]SO_4\) are

A.+2 and 0 respectively B.+3 and 0 respectively C.+3 and -1 respectively D.+1 and +1 respectively

As per IUPAC guidelines, the name of the complex \([Co(en)_2(ONO)Cl]Cl\) is

A.Chlorobisethylenediaminenitritocobalt(III) chloride B.Chloridobis(ethane-1,2-diamine)nitro -Ocobaltate(III) chloride C.Chloridobis(ethane-1,2-diammine)nitrito -Ocobalt(II) chloride D.Chloridobis(ethane-1,2-diammine)nitrito \(\kappa\) -Ocobalt(III)chloride

IUPAC name of the complex \(K_3[Al(C_2O_4)_3]\) is

A.Potassiumtrioxalatoaluminium(III) B.Potassiumtrioxalatoaluminate(II) C.Potassiumtrisoxalatoaluminate(III) D.Potassiumtrioxalatoaluminate(III)

A magnetic moment of 1.73BM will be shown by one among the following (NEET)

A.\(TiCl_4\) B.\([CoCl_6]^{4-}\) C.\([Cu(NH_3)_4]^{2+}\) D.\([Ni(CN)_4]^{2-}\)

Crystal field stabilization energy for high spin \(d^5\) octahedral complex is

A.\(-0.6 \Delta_o\) B.0 C.\(2(P - \Delta_o)\) D.\(2(P + \Delta_o)\)

In which of the following coordination entities the magnitude of \(\Delta_o\) will be maximum?

A.\([Co(CN)_6]^{3-}\) B.\([Co(C_2O_4)_3]^{3-}\) C.\([Co(H_2O)_6]^{3+}\) D.\([Co(NH_3)_6]^{3+}\)

Q10

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

A.\([Cr(NH_3)_6][Co(CN)_6]\) B.\([Co(en)_2Cl_2]\) C.\([Pt(NH_3)_4][PtCl_4]\) D.\([Co(NH_3)_4Cl_2]NO_2\)

Q11

Which type of isomerism is exhibited by \([Pt(NH_{3})_{2}Cl_{2}]\)?

A.Coordination isomerism B.Linkage isomerism C.Optical isomerism D.Geometrical isomerism

Q12

How many geometrical isomers are possible for \([Pt(py)(NH_{3})(Br)(Cl)]\)?

A.3 B.4 C.0 D.15

Q13

Which one of the following pairs represents linkage isomers?

A.\([Cu(NH_{3})_{4}][PtCl_{4}]\) and \([Pt(NH_{3})_{4}][CuCl_{4}]\) B.\([Co(NH_{3})_{5}(NO_{2})]SO_{4}\) and \([Co(NH_{3})_{5}(ONO)]SO_{4}\) C.\([Co(NH_{3})_{4}(NCS)_{2}]Cl\) and \([Co(NH_{3})_{4}(SCN)_{2}]Cl\) D.both (b) and (c)

Q14

Which kind of isomerism is possible for a complex \([Co(NH_{3})_{4}Br_{2}]Cl\)?

A.geometrical and ionization B.geometrical and optical C.optical and ionization D.geometrical only

Q15

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

A.\([Ni(NH_{3})_{4}(H_{2}O)_{2}]^{2+}\) B.\([Pt(NH_{3})_{2}Cl_{2}]\) C.\([Co(NH_{3})_{5}SO_{4}]Cl\) D.\([FeCl_{6}]^{3-}\)

Q16

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

A.\(K_{4}[Fe(CN)_{6}]\) B.\([Fe(CN)_{3}(NH_{3})_{3}]\) C.\([Fe(CO)_{5}]\) D.both (b) and (c)

Q17

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

A.\([Fe(en)_{3}]PO_{4}\) B.\([Fe(en)_{3}](PO_{4})_{3}\) C.\([Fe(en)_{3}](PO_{4})_{2}\) D.\([Fe(en)_{3}]_{3}(PO_{4})_{2}\)

Q18

Which of the following is paramagnetic in nature?

A.\([Zn(NH_{3})_{4}]^{2+}\) B.\([Co(NH_{3})_{6}]^{3+}\) C.\([Ni(H_{2}O)_{6}]^{2+}\) D.\([Ni(CN)_{4}]^{2-}\)

Q19

Fac-mer isomerism is shown by

A.\([Co(en)_{3}]^{3+}\) B.\([Co(NH_{3})_{4}Cl_{2}]^{+}\) C.\([Co(NH_{3})_{3}Cl_{3}]\) D.\([Co(NH_{3})_{5}Cl]SO_{4}\)

Q20

Choose the correct statement.

A.Square planar complexes are more stable than octahedral complexes B.The spin only magnetic moment of \([CuCl_{4}]^{2-}\) is \(1.732\text{ BM}\) and it has square planar structure. C.Crystal field splitting energy \(\Delta_{o}\) of \([FeF_{6}]^{4-}\) is higher than the \(\Delta_{o}\) of \([Fe(CN)_{6}]^{4-}\) D.The crystal field stabilization energy of \([V(H_{2}O)_{6}]^{2+}\) is higher than that of \([Ti(H_{2}O)_{6}]^{2+}\)

Q21

Which of the following observations correctly distinguishes a double salt from a coordination compound in aqueous solution?

A.A double salt dissociates into its constituent simple ions and loses its identity. B.A coordination compound dissociates completely into simple cations and anions. C.A double salt retains the identity of the complex ion in solution. D.Both types of compounds behave identically when dissolved in water.

Q22

According to Werner's theory, which type of valence is non-ionisable and corresponds to the coordination number of the metal?

A.Primary valence B.Secondary valence C.Tertiary valence D.Ionic valence

Q23

In the coordination entity \([Fe(CN)_6]^{4-}\), the central metal ion \(Fe^{2+}\) acts as a:

A.Lewis base B.Bronsted acid C.Lewis acid D.Reducing agent

Q24

What is the coordination number of \(Ni^{2+}\) in the complex \([Ni(en)_3]Cl_2\), where 'en' stands for ethane-1,2-diamine?

A.3 B.2 C.4 D.6

Q25

Based on IUPAC guidelines, what is the correct name for the complex \([Ag(NH_3)_2]Cl\)?

A.Diamminesilver(I) chloride B.Silver diamine chloride C.Diamminesergentate(I) chloride D.Diamine silver(II) chloride

Q26

Which suffix is used for the central metal atom in a coordination compound where the complex ion carries a net negative charge?

A.-ite B.-ide C.-ate D.-ium

Q27

Linkage isomerism arises in coordination compounds containing which type of ligand?

A.Unidentate ligands B.Ambidentate ligands C.Chelating ligands D.Bridging ligands

Q28

The compounds \([Pt(en)_2Cl_2]Br_2\) and \([Pt(en)_2Br_2]Cl_2\) are examples of:

A.Coordination isomers B.Hydration isomers C.Ionisation isomers D.Linkage isomers

Q29

In Valence Bond Theory (VBT), a complex with \(sp^3\) hybridisation will have which geometry?

A.Square planar B.Octahedral C.Tetrahedral D.Linear

Q30

Which of the following ligands is considered a 'strong field ligand' capable of causing pairing of electrons in the central metal atom?

A.\(Cl^-\) B.\(F^-\) C.\(CO\) D.\(Br^-\)

Q31

In an octahedral crystal field, the five degenerate d-orbitals split into which two sets of orbitals?

A.\(t_2\) and \(e\) B.\(t_{2g}\) and \(e_g\) C.\(s\) and \(p\) D.\(d_{xy}\) and \(d_{z^2}\)

Q32

Why are complexes of \(Zn^{2+}\) (with \(d^{10}\) configuration) generally colourless?

A.They absorb all wavelengths of visible light. B.The d-d transition is not possible because the d-orbitals are completely filled. C.They do not have a coordination sphere. D.The crystal field splitting energy is too high.

Q33

In metal carbonyls, the synergic effect that accounts for the strong M-CO bond is due to:

A.Only sigma bond formation B.Only pi-back bonding C.Both sigma donation from ligand and pi-back bonding from metal D.Electrostatic attraction between ions

Q34

Which of the following terms refers to the free energy change (\(\Delta G\)) of a complex formation reaction?

A.Kinetic stability B.Thermodynamic stability C.Labile nature D.Inert nature

Q35

Which essential vitamin is a coordination compound of cobalt?

A.Vitamin A B.Vitamin B12 C.Vitamin C D.Vitamin D

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About this Coordination Chemistry test

This free online practice test covers Coordination Chemistry from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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