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Coordination Compounds - Class 12 MCQ


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30 Questions MCQ Test - Coordination Compounds

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Coordination Compounds - Question 1

The EAN of platinum in potassium hexachloroplatinate (IV) is:        

Detailed Solution for Coordination Compounds - Question 1

Effective atomic no. (EAN) = 78-4+2x6=86. 

Coordination Compounds - Question 2

The hybridization of Fe in K4[Fe(CN)6] complex is:    

Detailed Solution for Coordination Compounds - Question 2

Electronic configuration of Fe2+ in K4Fe(CN)6 is:

x x Electron pair donated by CN

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Coordination Compounds - Question 3

The colour of [Ti(H2O)6]3+ is due to:    

Detailed Solution for Coordination Compounds - Question 3

the d-d-excitation is responsible for colour of T i(H2O)3+6 which has one unpaired electron.

Coordination Compounds - Question 4

[Cr(NH3)6]3+ ion is:    

Detailed Solution for Coordination Compounds - Question 4

[Cr(NH3)6]3+ has three unpaired electrons. Electronic configuration of Cr3+ in Cr(NH3)6 is:

Coordination Compounds - Question 5

Which will give a white precipitate with AgNO3 in aqueous solution?    

Detailed Solution for Coordination Compounds - Question 5

Coordination Compounds - Question 6

EDTA is a ........ligand.    

Detailed Solution for Coordination Compounds - Question 6

Coordination Compounds - Question 7

The number of ions formed on dissolving one molecule of FeSO4.(NH4)2SO4.6H2O in water is:    

Detailed Solution for Coordination Compounds - Question 7

It is a double salt:

Coordination Compounds - Question 8

Aqua regia reacts with Pt to yield:    

Detailed Solution for Coordination Compounds - Question 8

It is a fact

Coordination Compounds - Question 9

In [Cr(NH3)4CI2]CI the ligands are:    

Detailed Solution for Coordination Compounds - Question 9

Atoms or group donating electron pair to metal are ligands.

Coordination Compounds - Question 10

Which possesses tetrahedral shape (sp3 - hybridization of central atom?    

Detailed Solution for Coordination Compounds - Question 10

All involves sp3 - hybridization.

Coordination Compounds - Question 11

Which of the following is p complex?    

Detailed Solution for Coordination Compounds - Question 11

In π-complex, organic ligand use their π system to bond with metal, e.g., ferrocene.

Coordination Compounds - Question 12

Which complex has square planar shape & dsp2- hybridization?    

Detailed Solution for Coordination Compounds - Question 12

All involve dsp2-hybrdization

Coordination Compounds - Question 13

Formula of ferrocene is:    

Detailed Solution for Coordination Compounds - Question 13

Ferroc ene is cyclopentadienide iron complex.

Coordination Compounds - Question 14

The number of precipitable halide ions in [Pt(NH3)CI2Br]CI is:    

Detailed Solution for Coordination Compounds - Question 14

Coordination Compounds - Question 15

Which statement about coordination number of metal ion is true?    

Detailed Solution for Coordination Compounds - Question 15

The characteristics of coordination number.

Coordination Compounds - Question 16

The correct name of the compound [Cu(NH3)4](NO3)2, according to IUPAC system is:    

Detailed Solution for Coordination Compounds - Question 16

Follow IUPAC rules.

Coordination Compounds - Question 17

The formula of a carbonyl complex of (CO)n CO(CO)n, in  which there is a single covalent Co-Co bond is?    

Detailed Solution for Coordination Compounds - Question 17

Co shows zero oxidation state in its carbonyl  & follow EAN rule

Coordination Compounds - Question 18

Of the following complexes, the one with the largest value of the crystal field splitting is:    

Detailed Solution for Coordination Compounds - Question 18

CN- ligand has strong ligand field so, value of CFSE is higher

Coordination Compounds - Question 19

The IUPAC name of [CoCI(NO2)(en)2]CI is:    

Detailed Solution for Coordination Compounds - Question 19

Follow IUPAC rules.

Coordination Compounds - Question 20

In which complex is the transition metal in zero oxidation state?    

Detailed Solution for Coordination Compounds - Question 20

Ni in Ni(CO)4 has zero oxidation stae.

Coordination Compounds - Question 21

Which is low spin complex?    

Detailed Solution for Coordination Compounds - Question 21

Both CN- and NO2- are strong field ligands.

Coordination Compounds - Question 22

From the stability constant (hypothetical values) given below, predict which is the strongest ligand?

Detailed Solution for Coordination Compounds - Question 22

Higher is the stability constant of ligand, lesser is its dissoc iation, more is its stability.

Coordination Compounds - Question 23

Which of the following complex species do not involve d2sp3-hybridization?    

Detailed Solution for Coordination Compounds - Question 23

[Cr(NH3 )6 ][Co(CN)6 ] is isomer to [Co(NH3 )6 ][Cr(CN)6 ] , i.e., ligands are changed in complex anion and complex cation.

Coordination Compounds - Question 24

Which of the following compounds would exhibit coordination isomerism?    

Detailed Solution for Coordination Compounds - Question 24

S-atom is donor in SCN and N-atom is donor in NCS. The linkage isomerism arises when ligand has two possibilities to attach on central atom.

Coordination Compounds - Question 25

[(C6H5)2Pd(SCN)2] and [(C6H5)2Pd(NCS)2] are:    

Detailed Solution for Coordination Compounds - Question 25

Coordination Compounds - Question 26

[Cr(H2O6]CI3 (at. no. of Cr=24) has a magnetic moment of 3.83 BM. The correct distribution of 3d-electrons in the chromium of the complex:
 

Detailed Solution for Coordination Compounds - Question 26

Follow IUPAC rules.

Coordination Compounds - Question 27

The hypothetical complex chloro diaquatriammine cobalt(III) chloride can be represented as:    

Detailed Solution for Coordination Compounds - Question 27

Chlorodiaquatriamminecobalt(Ill) chloride can be represented as [CoCl(NH3)3(H2O)2]Cl2.

Coordination Compounds - Question 28

In the silver plating of Cu, K[Ag(CN)2] is used instead of AgNO3. The reason is:    

Detailed Solution for Coordination Compounds - Question 28

Copper being more electropositive readily precipitate silver from their salt (Ag+) solution.

In K[Ag(CN)2] solution a complex anion [Ag(CN)2] is formed so Ag+ ions are less available in the solution and Cu cannot displace Ag from this complex ion.

Coordination Compounds - Question 29

The complex used as an anticancer agent is:    

Detailed Solution for Coordination Compounds - Question 29

d6-cation with low spin ha selectronic congiguration t62ge0g

Total energy= (-0.4D0per e- x6)
(-0.4D0 per e- x6)

+(e- paring energy of 3 pairs)

Coordination Compounds - Question 30

Low spin complex of d6-cation in an octahedral field will have the following energy:

Detailed Solution for Coordination Compounds - Question 30

where x = number of electrons occupying t2g orbital

y = number of electrons occupying eorbital

z = number of pairs of electrons

For low spin d6 complex electronic configuration

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