On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

JEE Main

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

Select Subject

Physics

Chemistry

Mathematics

Coordination Compounds

Correct Marks 4

Incorrectly Marks -1

Q 1. Chelating ligands among following are:
{tex} \begin{array} { l l } { \text { (i) dien } } & { \text { (ii) } \mathrm { C } _ { 2 } \mathrm { O } _ { 4 } ^ { 2 - } } \\ { \text { (iii) gly } } & { \text { (iv) } \mathrm { py } } \\ { \text { (v) dipy } } \end{array} {/tex}

A

i, ii, iv, v

i, ii, iii, v

C

i, ii, iii, iv

D

i, iii, iv, v

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 2. On the basis of sidgwick EAN rule, which of the following statement is not correct?

A

{tex} \left[ \mathrm { Mn } ( \mathrm { CO } ) _ { 6 } \right] {/tex} can act as reducing agent.

B

{tex} \left[ \mathrm { V } ( \mathrm { CO } ) _ { 6 } \right] {/tex} can act as oxidising agent.

{tex} \left[ \mathrm { Fe } ( \mathrm { CO } ) _ { 5 } \right] {/tex} can act as both oxidising agent and reducing agent.

D

{tex} \left[ \mathrm { Mn } ( \mathrm { CO } ) _ { 5 } \right] {/tex} show dimerisation to gain stability.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 3. The IUPAC name for the complex, {tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 2 } \mathrm { Cl } \right (\mathrm{ONO}) \left( \mathrm { P } _ { \mathrm { y } } \right) _ { 2 } ] \mathrm { NO } _ { 3 } {/tex} is:

A

Diamminechlorido dipyridinenitrito-N-cobaltate (III) nitrate

B

Diammine chloridonitrito-O-bipyridine cobalt (III) nitrate

Diamminechloridonitrito-O-dipyridine cobalt (III) nitrate

D

Chloridodiamminenitrito-O-bis(pyridine) cobalt (III) nitrate

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 4. Which of the following pairs of name and formula of complexes is not correct?

A

Tetraamminecopper(II) sulphate {tex} \left[ \mathrm { Cu } \left( \mathrm { NH } _ { 3 } \right) _ { 4 } \right] \mathrm { SO } _ { 4 } {/tex}

B

Diamminesilver(I) chloride {tex} \left[ \mathrm { Ag } \left( \mathrm { NH } _ { 3 } \right) _ { 2 } \right] \mathrm { Cl } {/tex}

Potassium hexacyanidoferrate(III){tex} [ \mathrm { K } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right]{/tex}

D

Potassium amminepentachloridoplatinate (IV) {tex}[\mathrm K[ \operatorname { Pt } \left( \mathrm { NH } _ { 3 } \right) \mathrm { Cl } _ { 5 }]{/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 5. Which of the following ligand act as WFL for octahedral complex of {tex} \mathrm { Co } ^ { + 3 } {/tex} ion?

{tex} \mathrm { F } ^ { - } {/tex}

B

{tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex}

C

{tex} \mathrm { C } _ { 2 } \mathrm { O } _ { 4 } ^ { - 2 } {/tex}

D

All of these

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 6. A complex has magnetic moment 1.73 BM. Which of the following configuration of metal ion is not possible?

A

{tex} \mathrm { d } ^ { 7 } , {/tex} octahedral, lowspin

B

{tex} \mathrm { d } ^ { 5 } , {/tex} octahedral, lowspin

{tex} \mathrm { d } ^ { 8 } , {/tex} square planar

D

{tex} \mathrm { d } ^ { 9 } , {/tex} tetrahedral

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 7. Which follows EAN Rule?

A

{tex} \left[ \mathrm { Pd } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] \mathrm { Cl } _ { 4 } {/tex}

B

{tex} \left[ \mathrm { Cr } \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \mathrm { Cl } \right] \mathrm { SO } _ { 4 } {/tex}

{tex} \mathrm { Na } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}

D

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

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 8. {tex} \left[ \mathrm { NiCl } _ { 4 } \right] ^ { - 2 } {/tex} and {tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { - 2 } {/tex} show similarity in:

A

Geometry

B

Magnetic nature

C

Hybridisation of state of Ni

Primary valency of Ni

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 9. The oxidizing agent is:

A

{tex} \mathrm { Fe } ( \mathrm { CO } ) _ { 5 } {/tex}

B

{tex} \mathrm { Mn } ( \mathrm { CO } ) _ { 5 } {/tex}

C

{tex} \mathrm { Mn } _ { 2 } ( \mathrm { CO } ) _ { 10 } {/tex}

{tex} \mathrm { Fe } _ { 2 } ( \mathrm { CO } ) _ { 9 } {/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 10. Inner orbital complex which is paramagnetic in nature?

A

{tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 5 } \right] ^ { - 3 } {/tex}

B

{tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { - 4 } {/tex}

C

{tex} \left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 5 } ( \mathrm { NO } ) \right] \mathrm { SO } _ { 4 } {/tex}

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

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 11. VBT can not explain the geometry of:

A

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

B

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

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

D

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

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 12. Which of the following isomerism is not present in complex {tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 4 } ( \mathrm { SCN } ) _ { 2 } \right] \mathrm { Br } ? {/tex}

A

Geometrical isomerism

B

Linkage isomerism

C

Ionisation isomerism

Optical isomerism

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 13. Which of the following is correct order of stability?

A

{tex} \left[ \mathrm { NiCl } _ { 4 } \right] ^ { - 2 } < \left[ \mathrm { PdCl } _ { 4 } \right] ^ { - 2 } < \left[ \mathrm { PtCl } _ { 4 } \right] ^ { - 2 } {/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 } ( \mathrm { CN } ) _ { 6 } \right] ^ { - 3 } {/tex}

C

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

All of these

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 14. Which is correct statement?

A

{tex} \left[ \mathrm { Co } ( \mathrm { en } ) _ { 3 } \right] \left[ \mathrm { Cr } ( \mathrm { CN } ) _ { 6 } \right] {/tex} will display coordination isomerism

B

{tex} \left[ \mathrm { Mn } ( \mathrm { CO } ) _ { 5 } ( \mathrm { SCN } ) \right] {/tex} will display linkage isomerism

C

{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \left( \mathrm { NO } _ { 2 } \right) \right] \mathrm { SO } _ { 4 } {/tex} will display ionization isomerism

All are correct

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 15. The incorrect statement is:

A

{tex} \mathrm { Fe } ^ { + 2 } {/tex} salt gives blue colloidal solution with {tex} \mathrm { K } _ { 3 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}

B

{tex}FeCl_{3}{/tex} gives red colour with {tex} \mathrm { K } \mathrm { SCN } {/tex}

{tex} \mathrm { Cu } ^ { + 2 } {/tex} salt gives blue colloidal solution with {tex} \mathrm { K } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}

D

Light blue solution of {tex} \mathrm { CuSO } _ { 4 } {/tex} turn into dark blue in presence of ammonia.

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 16. Which of the following pair contains only ambidenate ligand?

A

{tex} \mathrm { CN }^{-} , \mathrm { NH } _ { 3 } {/tex}

{tex} \mathrm { NO } _ { 2 } ^ { - } , \mathrm { SCN } ^ { - } {/tex}

C

{tex} \mathrm { H } _ { 2 } \mathrm { O } , \mathrm { en } {/tex}

D

en, dien

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 17. An example for a double salt is:

A

Cuprammonium sulphate

Mohr's salt

C

Potassium ferricyanide

D

Cobalthexammine chloride

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 18. EDTA is a:

A

Polydenate ligand

B

Chelating ligand

C

Flexidenate ligand

All of these

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 19. Which can't form chelates?

A

Didentate ligand

Ambidentate ligand

C

Tetradentate lignad

D

Flexidenate ligand

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 20. In sodium nitroprusside the oxidation number, coordination number and effective atomic number of iron are respectively:

A

{tex} + 3,6,35 {/tex}

B

{tex} + 3,6,36 {/tex}

C

{tex} + 2,3,36 {/tex}

{tex} + 2,6,36 {/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 21. In the coordination compound, {tex} \mathrm { K } _ { 4 } \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] , {/tex} the oxidation state of nickel is

A

{tex} - 1 {/tex}

{tex}0{/tex}

C

{tex} + 1 {/tex}

D

{tex} + 2 {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 22. In {tex} \mathrm { Fe } ( \mathrm { CO } ) _ { 5 } , {/tex} the {tex} \mathrm { Fe } - \mathrm { C } {/tex} bond possesses

A

{tex} \pi {/tex} - character only

both {tex} \sigma {/tex} and {tex} \pi {/tex} characters

C

ionic character

D

{tex} \sigma {/tex} -character only.

Explanation




Correct Marks 4

Incorrectly Marks -1

Q 23. Coordination compounds have great importance in
biological systems. In this context which of the following statements is incorrect?

Chlorophylls are green pigments in plants and contain calcium.

B

Haemoglobin is the red pigment of blood and contains iron.

C

Cyanocobalamine is {tex} \mathrm { B } _ { 12 } {/tex} and contains cobalt.

D

Carboxypeptidase {tex} \mathrm {-A} {/tex} is an enzyme and contains zinc.

Explanation


Correct Marks 4

Incorrectly Marks -1

Q 24. The {tex} \mathrm {IUPAC} {/tex} name for the complex {tex} \left[ \mathrm { Co } \left( \mathrm { NO } _ { 2 } \right) \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \right] \mathrm { Cl } _ { 2 } {/tex} is

A

nitrito-N-pentaamminecobalt(III) chloride

B

nitrito-N-pentaaminccobalt(II) chloride

C

pentaammine nitrito-N-cobalt(II) chloride

pentaammine nitrito-N-cobalt(III) chloride.

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 25. The {tex} \mathrm {IUPAC} {/tex} name of the coordination compound {tex} \mathrm { K } _ { 3 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex} is

A

potassium hexacyanoferrate (II)

potassium hexacyanoferrate (III)

C

potassium hexacyanoiron (II)

D

tripotassium hexacyanoiron (II)

Explanation