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Explore popular questions from Coordination Compounds for NEET. This collection covers Coordination Compounds previous year NEET questions hand picked by popular teachers.


Q 1.    

Correct4

Incorrect-1

An example of a sigma bonded organometallic compound is

Grignard's reagent

B

ferrocene

C

cobaltocene

D

ruthenocene.

Explanation

Q 2.    

Correct4

Incorrect-1

The correct order of the stoichiometries of {tex} \mathrm { AgCl}{/tex} formed when {tex} \mathrm { AgNO } _ { 3 } {/tex} in excess is treated with the complexes: {tex} \mathrm { CoCl } _ { 3 } . 6 \mathrm { NH } _ { 3 } , \mathrm { CoCl } _ { 3 }.5 \mathrm { NH } _ { 3 }, {/tex} {tex} \mathrm { CoCl } _ { 3 }.4 \mathrm { NH } _ { 3 } {/tex} respectively is

A

{tex} 3 \mathrm { AgCl } , 1 \mathrm { AgCl } , 2 \mathrm { AgCl } {/tex}

{tex} 3 \mathrm { AgCl } , 2 \mathrm { AgCl } , 1 \mathrm { AgCl } {/tex}

C

{tex} 2 \mathrm { AgCl } , 3 \mathrm { AgCl } , 2 \mathrm { AgCl } {/tex}

D

{tex} 1 \mathrm { AgCl } , 3 \mathrm { AgCl } , 2 \mathrm { AgCl } {/tex}

Explanation

Q 3.    

Correct4

Incorrect-1

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of {tex} \mathrm { Co } ^ { 3 + } {/tex} is

A

{tex} \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Co } ( e n ) _ { 3 } \right] ^ { 3 + } , \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } {/tex}

B

{tex} \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Co } ( e n ) _ { 3 } \right] ^ { 3 + } {/tex}

C

{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Co } ( e n ) _ { 3 } \right] ^ { 3 + } , \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}

{tex} \left[ \mathrm { Co } ( e n ) _ { 3 } \right] ^ { 3 + } , \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}

Explanation



Q 4.    

Correct4

Incorrect-1

Pick out the correct statement with respect to {tex} \left[ \mathrm { Mn } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex}

A

It is {tex} s p ^ { 3 } d ^ { 2 } {/tex} hybridised and tetrahedral.

It is {tex} d ^ { 2 } s p ^ { 3 } {/tex} hybridised and octahedral.

C

It is {tex} d s p ^ { 2 } {/tex} hybridised and square planar.

D

It is {tex} s p ^ { 3 } d ^ { 2 } {/tex} hybridised and octahedral.

Explanation



Q 5.    

Correct4

Incorrect-1

The correct increasing order of {tex}trans{/tex}-effect of the following species is

A

{tex} \mathrm { NH } _ { 3 } > \mathrm { CN^- } > \mathrm { Br } ^ { - } > \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } ^ { - } {/tex}

{tex} \mathrm { CN } ^ { - } > \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } ^ { - } > \mathrm { Br } ^ { - } > \mathrm { NH } _ { 3 } {/tex}

C

{tex} \mathrm { Br } ^ { - } > \mathrm { CN } ^ { - } > \mathrm { NH } _ { 3 } > \mathrm { C } _ { 6 } \mathrm { H } _ { 5 }^- {/tex}

D

{tex} \mathrm { CN } ^ { - } > \mathrm { Br } ^ { - } > \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } ^ { - } > \mathrm { NH } _ { 3 } {/tex}

Explanation


Q 6.    

Correct4

Incorrect-1

Jahn-Teller effect is not observed in high spin complexes of

A

{tex} d ^ { 7 } {/tex}

{tex} d ^ { 8 } {/tex}

C

{tex} d ^ { 4 } {/tex}

D

{tex} d ^ { 9 } {/tex}

Explanation


Q 7.    

Correct4

Incorrect-1

Which of the following has longest {tex} \mathrm { C } - \mathrm { O } {/tex} bond length? ( Free {tex} \mathrm { C } - {/tex} O bond length in {tex} \mathrm { CO } {/tex} is {tex}1.128\space {\text{Å}} {/tex} .)

{tex} \left[ \mathrm { Fe } ( \mathrm { CO } ) _ { 4 } \right] ^ { 2 - } {/tex}

B

{tex} \left[ \mathrm { Mn } ( \mathrm { CO } ) _ { 6 } \right] ^ { + } {/tex}

C

{tex} \mathrm { Ni } ( \mathrm { CO } ) _ { 4 } {/tex}

D

{tex} \left[ \mathrm { Co } ( \mathrm { CO } ) _ { 4 } \right] ^-{/tex}

Explanation


Q 8.    

Correct4

Incorrect-1

The hybridization involved in complex {tex} \mathrm { [Ni } ( \mathrm { CN } ) _ { 4 } ]^ { 2 - }{/tex} is (At. No. Ni = 28)

A

{tex} s p ^ { 3 } {/tex}

B

{tex} d ^ { 2 } s p ^ { 2 } {/tex}

C

{tex} d ^ { 2 } s p ^ { 3 } {/tex}

{tex} d s p ^ { 2 } {/tex}

Explanation


Q 9.    

Correct4

Incorrect-1

The name of complex ion, {tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} is

A

hexacyanitoferrate (III) ion

B

tricyanoferrate (III) ion

hexacyanidoferrate (III) ion

D

hexacyanoiron (III) ion.

Explanation

Q 10.    

Correct4

Incorrect-1

The sum of coordination number and oxidation number of the metal {tex} M {/tex} in the complex {tex} \left[ M ( e n ) _ { 2 } \left( \mathrm { C } _ { 2 } \mathrm { O } _ { 4 } \right) \right] \mathrm { Cl } ( \text { where } e n \text { is ethylenediamine) } {/tex}

A

6

B

7

C

8

9

Explanation


Q 11.    

Correct4

Incorrect-1

Number of possible isomers for the complex {tex} \left[ \mathrm { Co } ( e n ) _ { 2 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex} will be {tex} ( e n = \text { ethylenediamine) } {/tex}

A

1

3

C

4

D

2

Explanation



Q 12.    

Correct4

Incorrect-1

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25{tex} ^ { \circ } \mathrm { C } {/tex} ?

A

{tex} \mathrm { CoCl } _ { 3 }.5 \mathrm { NH } _ { 3 } {/tex}

B

{tex} \mathrm { CoCl } _ { 3 }. 6 \mathrm { NH } _ { 3 } {/tex}

{tex} \mathrm { CoCl } _ { 3 } . 3 \mathrm { NH } _ { 3 } {/tex}

D

{tex} \mathrm { CoCl } _ { 3 }.4 \mathrm { NH } _ { 3 } {/tex}

Explanation


Q 13.    

Correct4

Incorrect-1

Which of these statements about {tex} \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3- } {/tex} is true?

A

{tex} \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} has four unpaired electrons and will be in a high-spin configuration.

B

{tex} \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} has no unpaired electrons and will be in a high-spin configuration.

{tex} \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} has no unpaired electrons and will be in a low-spin configuration.

D

{tex} \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} has four unpaired electrons and will be in a low-spin configuration.

Explanation


Q 14.    

Correct4

Incorrect-1

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

A

{tex} \left[ \mathrm { Mn } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}

{tex} \left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}

C

{tex} \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + } {/tex}

D

{tex} \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}

Explanation


Q 15.    

Correct4

Incorrect-1

Which of the following complexes is used to be as an anticancer agent?

A

{tex} m e r - \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 3 } \mathrm { Cl } _ { 3 } \right] {/tex}

{tex}cis - \mathrm { PtCl } _ { 2 } \left( \mathrm { NH } _ { 3 } \right) _ { 2 } {/tex}

C

{tex}cis -\mathrm{ K _ { 2 } [ P t Cl _ { 2 } B r _ { 2 } ] }{/tex}

D

{tex} \mathrm { Na } _ { 2 } \mathrm { CoCl } _ { 4 } {/tex}

Explanation

Q 16.    

Correct4

Incorrect-1

A magnetic moment at {tex} \mathrm { 1.73\ BM } {/tex} will be shown by one among of the following

A

{tex} \mathrm { TiCl } _ { 4 } {/tex}

B

{tex} \left[ \mathrm { CoCl } _ { 6 } \right] ^ { 4- } {/tex}

{tex} \left[ \mathrm { Cu } \left( \mathrm { NH } _ { 3 } \right) _ { 4 } \right] ^ { 2 + } {/tex}

D

{tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { 2 - } {/tex}

Explanation


Q 17.    

Correct4

Incorrect-1

An excess of {tex}\mathrm {AgNO_3}{/tex} is added to 100 mL of a {tex} \mathrm { 0.01 M } {/tex} solution of dichlorotetraaquachromium (III) chloride. The number of moles of {tex} \mathrm { AgCl } {/tex} precipitated would be

A

0.003

B

0.01

0.001

D

0.002

Explanation



Q 18.    

Correct4

Incorrect-1

Crystal field splitting energy for high spin {tex} d ^ { 4 } {/tex} octahedral complex is

A

{tex} - 1.2 \Delta _ { o } {/tex}

{tex} - 0.6 \Delta _ { \circ} {/tex}

C

{tex} - 0.8 \Delta _ { o } {/tex}

D

{tex} - 1.6 \Delta _ { \circ } {/tex}

Explanation


Q 19.    

Correct4

Incorrect-1

In a particular isomer of {tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 4 } \mathrm { Cl } _ { 2 } \right] ^ { 0 } , {/tex} the {tex} \mathrm { Cl } - \mathrm { Co } - \mathrm { Cl } {/tex} angle is {tex} 90 ^ { \circ } , {/tex} the isomer is known as

A

optical isomer

cis-isomer

C

position isomer

D

linkage isomer.

Explanation

Q 20.    

Correct4

Incorrect-1

The anion of acetylacetone (acac) forms {tex} \mathrm { Co } ( \mathrm { acac } ) _ { 3 } {/tex} chelate with {tex} \mathrm { Co } ^ { 3 + } {/tex} . The rings of the chelate are

A

five membered

B

four membered

six membered

D

three membered

Explanation


Q 21.    

Correct4

Incorrect-1

The correct IUPAC name for {tex} \left[ \mathrm { CrF } _ { 2 } ( e n ) _ { 2 } \right] \mathrm { Cl } {/tex} is

A

chloro difluorido ethylene diaminechromium (III) chloride

difluoridobis (ethylene diamine) chromium (III) chloride

C

difluorobis-(ethylene diamine) chromium (III) chloride

D

chloro difluoridobis (ethylene diamine) chromium (III)

Explanation

Q 22.    

Correct4

Incorrect-1

Which among the following is a paramagnetic complex?
(At.No. Mo = 42, Pt =78)

A

{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } {/tex}

B

{tex} \left[ \mathrm { Pt } ( e n ) \mathrm { Cl } _ { 2 } \right] {/tex}

{tex} \left[ \operatorname { CoBr } _ { 4 } \right] ^ { 2 - } {/tex}

D

{tex} \mathrm { Mo } ( \mathrm { CO } ) _ { 6 } {/tex}

Explanation


Q 23.    

Correct4

Incorrect-1

Which is diamagnetic?

A

{tex} \left[ \mathrm { Co } ( \mathrm { F } ) _ { 6 } \right] ^ { 3- } {/tex}

{tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { 2 - } {/tex}

C

{tex} \left[ \mathrm { NiCl } _ { 4 } \right] ^ { 2 - } {/tex}

D

{tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3- } {/tex}

Explanation



Q 24.    

Correct4

Incorrect-1

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

{tex} \left[ \mathrm { Ni } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 2 + } {/tex}

B

{tex} \left[ \mathrm { Zn } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 2 + } {/tex}

C

{tex} \left[ \mathrm { Cr } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } {/tex}

D

{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + } {/tex}

Explanation

Q 25.    

Correct4

Incorrect-1

Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II). Which of the following statements is not true?

A

Red complex has a square planar geometry.

B

Complex has symmetrical H-bonding.

Red complex has a tetrahedral geometry.

D

Dimethylglyoxime functions as bidentate ligand.

Explanation