Coordination Compounds

CBSE Class 12 Chemistry · every board question from this chapter, 2022–2026 · 42 of them repeated across years

• The oxidation number of Pt in [Pt(en) 2 Cl 2]^2+ is:2026
• The coordination number of Co in [Co(en) 2 Cl 2]^+ is:2026
• The oxidation number of Co in [Co(en) 3] 2(SO 4) 3 is:2026
• The chelating ligand used for the treatment of lead poisoning is:2026
• According to Werner's theory, the primary valencies of the central metal atom:2026asked 3×
• Number of possible stereoisomers for the complex [Co(en) 2 Cl 2] Cl will be:2026
• The oxidation number of Co in [Co(NH 3) 5(ONO)] SO 4 is:2026
• The correct IUPAC name of the complex [Pt(NH 3) 2 C l 2] is:2026asked 3×
• Which of the following is heteroleptic complex?2026asked 3×
• The secondary valency of Co in [Co(en) 3]^3+ is2026
• The secondary valency of Pt in [Pt(en) 2 Cl 2]^2+ is2026
• The secondary valency of Co in the complex [Co(NH 3) 5(NO 2)]^2+ is2026
• Which of the following ligands forms a chelate complex?2026asked 3×
• Write IUPAC names of the following compounds: [Ag(NH 3) 2][Ag(CN) 2] [Co(en) 3] 2(SO 4) 32026
• Write the formulas for the following coordination compounds: Mercury(I) tetrathiocyanato-S-cobaltate(III) Dichloridobis…2026
• Write IUPAC names of the following coordination compounds: (i) [Ag(NH 3) 2][Ag(CN) 2] (ii) K 3[Fe(C 2 O 4) 3] OR (i) Give a…2026asked 3×
• Write IUPAC names of the following compounds: [Cr(NH 3) 4(ONO) Cl] NO 3 Na[Ag(CN) 2]2026
• Write IUPAC names of the following compounds: (i) [PtCl 2(en) 2] SO 4 (ii) (NH 4) 2[CoF 4] OR Define the following terms with a…2026asked 3×
• Define coordination number. 1+1 Indicate the type of isomerism exhibited by the following complex: [Co(en) 3] Cl 32026asked 2×
• Define didendate ligand. Give an example. 1 + 1 Indicate the type of isomerism exhibited by the given complex: [Pt(NH 3)(H 2 O)…2026
• [Co(NH 3) 6]^3+ is diamagnetic whereas [CoF 6]^3- is paramagnetic. Justify the statement. [Atomic number of Co=27 ] Write the…2026
• [Fe(H 2 O) 6]^2+ is paramagnetic whereas [Fe(CO) 5] is diamagnetic. Justify the statement. [Atomic number of Fe=26 ] 2+1 On the…2026
• When a coordination compound CoCl 3 · 6 NH 3 is mixed with excess of AgNO 3 solution, 3 moles of AgCl are precipitated per mole…2026asked 3×
• Write the IUPAC name of the given complex: [Co(NH 3) 4(H 2 O) Cl] Cl 2 Define polydentate ligand. Give an example. Mention the…2026
• Write the IUPAC name of the given complex: K 2[Zn(OH) 4] Differentiate between a double salt and a complex. Mention the type of…2026
• Answer the following questions about the complexes [NiCl 4]^2- and [Ni(CN) 4]^2- (i) Write the hybridization involved in each…2026asked 3×
• Write the IUPAC name of the following complex: K 3[Cr(C 2 O 4) 3] Differentiate between homoleptic complex and heterolyptic…2026
• Explain why [Fe(H 2 O) 6]^3+ is strongly paramagnetic whereas [Fe(CN) 6]^3- is weakly paramagnetic. [Atomic number of Fe=26 ] 2 +…2026
• A coordination compound CrCl 3 · 6 H 2 O is mixed with excess of AgNO 3 solution, two moles of AgCl are precipitated per mole of…2026
• A coordination compound CrCl 3 · 6 H 2 O is mixed with excess of AgNO 3 solution, three moles of AgCl are precipitated per mole…2026
• A coordination compound CrCl 3 · 6 H 2 O is mixed with excess of AgNO 3 solution, one mole of AgCl is precipitated per mole of…2026
• The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal…2026asked 3×
• Coordination number of Fe in [Fe(C 2 O 4) 3]^3- is:2025
• Which of the following complexes show linkage isomerism?2025
• According to Werner's theory of coordination compounds:2025
• Which of the following complexes shows geometrical isomerism?2025
• Which of the following complex ion is not optically active?2025
• The complex ions [Co(NH 3) 5(NO 2)]^2+ and [Co(NH 3) 5(ONO)]^2+ are called2025asked 3×
• The correct IUPAC name of [Pt(NH 3) 2 Cl 2]^2+ is2025asked 3×
• Out of the following statements, the incorrect statement is:2025asked 2×
• The number of moles of AgCl precipitated when excess AgNO 3 solution is mixed with one mole of [Co(NH 3) 4 Cl 2] Cl is:2025
• The number of moles of AgCl precipitated when excess AgNO 3 solution is mixed with one mole of [Co(NH 3) 3 Cl 3] is:2025
• Out of the following statements, the correct statement is:2025
• The number of moles of AgCl precipitated when excess AgNO 3 solution is mixed with one mole of [Co(NH 3) 6] Cl 3 is:2025
• The primary and secondary valences of Co in [Co(en) 3] Cl 3 respectively are:2025
• Assertion: [Cr(H 2 O) 6] C l 2 and [Fe(H 2 O) 6] C l 2 are examples of homoleptic complexes. Reason (R): All the ligands attached…2025asked 3×
• PtCl 4 · 2 KCl doesn't give precipitate of AgCl with AgNO 3 solution. Write the structural formula and IUPAC name of the complex.2025asked 2×
• Write the IUPAC name of the complex [Pt(en) 2 Cl 2]^2+. Draw the structure of geometrical isomer of this complex which is…2025asked 3×
• Write IUPAC names of the following coordination compounds: (i) [CoCl 2(en) 2] SO 4 (ii) K 3[Fe(C 2 O 4) 3] OR Differentiate…2025asked 3×
• Explain [Co(NH 3) 6]^3+ is an inner orbital complex whereas [Ni(NH 3) 6]^2+ is an outer orbital complex. [At. No. Co=27, Ni=28 ]2025
• PdCl 2 · 2 KCl does not give precipitate of AgCl with AgNO 3 solution. Write the structural formula and IUPAC name of the complex.2025
• Name the following coordination compounds according to IUPAC norms: 2 × 1 [Co(NH 3) 4(H 2 O) C l] C l 2 [CrCl 2(en) 2] C l2025asked 2×
• What is meant by crystal field splitting energy? For a d^4 ion, write the configuration if (i) Δ o<P, and (ii) Δ o P. Explain why…2025
• Write the name and structure of a hexadentate ligand. 1 Why is [Ni(CN) 4]^2- square planar while [Ni(CO) 4] is tetrahedral?…2025
• Based on Valence Bond Theory, explain the geometry and magnetic character of [NiCl 4]^2-. [Atomic number: Ni=28 ] Draw the…2025
• Using valence bond theory, explain the hybridization and magnetic character of the following: 2 × 1 (1)/(2)=3 [Co(NH 3) 6]^3+…2025
• Answer the following about the complexes [FeF 6]^3- and [Fe(CN) 6]^4-: (i) Write the hybridization involved in each case. (ii)…2025asked 3×
• Write IUPAC names of the following coordination entities: [Fe(en) 2 Cl 2]^+ [Co(NH 3) 4(H 2 O) Br] SO 4 [Ni(CN) 4]^2-2025
• Using valence bond theory, explain the hybridization and magnetic behaviour of the following: 2+1=3 (i) [Co(NH 3) 6] C l 3 (ii) K…2025
• The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the…2025asked 3×
• Werner's coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be…2025asked 3×
• For the complex [Fe(en) 2 C l 2] C l, identify: 5 the oxidation number of iron. the hybridization and the shape of the complex.…2025
• (i) Give reasons: (I) [Ni(CO) 4] is diamagnetic whereas [NiCl 4]^2- is paramagnetic. [Atomic number: Ni = 28] (II) CO is a…2025asked 3×
• Answer the following: Low spin tetrahedral complexes are not known. Co^2+ is easily oxidised to Co^3+ in the presence of a strong…2025
• In the following complex ions, explain the type of hybridisation, shape and magnetic property: (2 (1)/(2) × 2=5) [Fe(H 2 O) 6]^2+…2025
• Which of the following ligands is an ambidentate ligand?2024
• Which of the following ligands can show linkage isomerism in a coordination compound?2024
• Ligand EDTA ^4- is an example of a:2024
• The coordination number of Co in [Co(en) 3]^3+ is:2024
• On adding AgNO 3 solution to 1 mole of complex NiCl 2 · 4 NH 3, two moles of AgCl are formed. The secondary valency of Ni in the…2024
• On adding AgNO 3 solution to 1 mole of CoCl 3 · 4 NH 3, one mole of AgCl is precipitated. The secondary valency of Co is:2024
• The type of isomerism shown by the complex [CoCl 2(en) 2]^+ is:2024asked 2×
• Which one of the following hybrid states is associated with low spin complex?2024
• Which one of the following complexes is non-ionisable?2024
• Which of the following ligand forms chelate complex?2024
• Draw the geometrical isomers of the given complex: [Pt(en) 2 Cl 2]^2+ Write the electronic configuration for d^4 ion if Δ 0<P on…2024
• Draw the geometrical isomers of the given complex: [Co(en) 2 Cl 2]^+ Write the electronic configuration of d^4 ion if Δ 0 P. What…2024
• Draw the geometrical isomers of the given complex: [Pt(NH 3) 2 Cl 2]^2+ Write the electronic configuration of d^5 ion if Δ 0<P.…2024
• Write the IUPAC names of the following coordination compounds (any three): [Co(NH 3) 4 Cl(NO 2)] Cl [Ni(NH 3) 6] C l 2 K 3[Cr(C 2…2024asked 2×
• Write the formula for the following coordination compound: Potassium tetrahydroxidozincate (II) Arrange the following complexes…2024asked 3×
• Write IUPAC names of the following coordination compounds: (any three) K 3[Fe(CN) 6] [Pt(en) 2 Cl 2]^2+ [Co(NH 3) 4 Cl(ONO)] Cl…2024
• The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond theory. The central…2024asked 3×
• The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed…2024
• The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed…2024asked 2×
• The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas…2024asked 3×
• Answer any five of the following: How is the crystal field splitting energy for octahedral complex (Δ 0) related to that of…2024asked 3×
• Attempt any five of the following: Write the IUPAC name of the complex: [Co(H 2 O)(CN)(en) 2]^2+ Why is geometrical isomerism not…2024asked 3×
• What is the secondary valency of Cobalt in [Co(en 2) Cl 2]^+? 12023
• Which of the following ligands is an ambidentate ligand?2023
• The compounds [Cr(H 2 O) 6] Cl 3,[Cr(H 2 O) 5 Cl] Cl 2 · H 2 O and [Cr(H 2 O) 4 Cl 2] Cl.2 H 2 O exhibit:2023
• [Co(NH 3) 5 NO 3] SO 4 and [Co(NH 3) 5 SO 4] NO 3 exhibit:2023
• What type of isomerism is shown by the following pair of complex compounds? [Co(NH 3) 6][Cr(CN) 6] and [Cr(NH 3) 6][Co(CN) 6]2023
• The compounds [Co(SO 4)(NH 3) 5] Br and [Co(Br)(NH 3) 5] SO 4 represent:2023asked 3×
• How many ions are produced in the solution from the complex [Ni(NH 3) 6] Cl 2?2023
• Which of the following species is not expected to be a ligand?2023
• Which of the following is a polydentate ligand?2023
• Which of the following complexes is a'chelate'complex?2023
• The formula of the complex Iron (III) hexacyanidoferrate (II) is:2023
• The formula of the complex dichloridobis (ethane -1,2 -diamine) platinum (IV) nitrate is2023asked 2×
• The crystal field splitting energy in tetrahedral crystal field (Δ t) is equal to:2023
• Optical isomerism is not shown by the complex:2023
• The magnetic moment of [NiCl 4]^2-2023
• Which of the following is the most stable complex species?2023
• Which of the following coordination compounds exhibits linkage isomerism?2023
• Assertion: EDTA is a hexadentate ligand. Reason (R): EDTA has 2 nitrogen and 4 oxygen donor atoms.2023
• Assertion: Low spin tetrahedral complexes are rarely observed. Reason (R): Crystal field splitting energy is less than pairing…2023asked 2×
• Assertion: [Co(NH 3) 5 SO 4] C l gives a white precipitate with silver nitrate solution. Reason (R): The complex dissociates to…2023
• Assertion: EDTA is used to determine hardness of water. Reason (R): EDTA is a bidentate ligand.2023
• Assertion: Trans [Cr C l 2(ox) 2]^3- shows optical isomerism. Reason (R): Optical isomerism is common in octahedral complexes…2023
• Write IUPAC names of the following: [Co(en) 2(H 2 O)(CN)]^2+ [Ni(NH 3) 6] Cl 22023
• Which of the following species cannot act as a ligand? Give reason. OH^-, NH 4^+, CH 3 NH 2, H 2 O The complex [Co(NH 3) 5(NO 2)]…2023asked 3×
• Write the IUPAC names of the following: 2 × 1 (i) [Co(NH 3) 5(ONO)]^2+ (ii) K 2[NiCl 4] OR (i) What is a chelate complex? Give…2023asked 3×
• Write IUPAC names of the following coordination entities: [Cr(NH 3) 3(H 2 O) 3] Cl 3 K 3[Al(C 2 O 4) 3]2023
• Write IUPAC names of the following coordination entities: [Co(NH 3) 4 Cl(NO 2)] Cl [PtCl 2(en) 2]^2+2023
• On the basis of crystal field theory, write the electronic configuration for d^4 with a strong field ligand for which Δ 0 P. A…2023
• On the basis of crystal field theory write the electronic configuration for d^5 ion with a strong field ligand for which Δ 0 P.…2023
• On the basis of crystal field theory write the electronic configuration for d^5 ion with a weak ligand for which Δ 0<P. Explain…2023
• Answer any three of the following questions: Explain the type of hybridization in [Fe(CN) 6]^3- on the basis of valence bond…2023asked 3×
• Draw the geometrical isomers of [Co(en) 2 Cl 2]^2+. Which geometrical isomer of [Co(en) 2 Cl 2]^2+ is not optically active and…2023asked 3×
• In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are…2023asked 3×
• Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions…2023asked 3×
• Write the hybridisation and magnetic character of the following complexes: (i) [NiCl 4]^2- (ii) [Co(NH 3) 6]^3+ (iii) [FeF 6]^3-…2022asked 3×
• (i) Write the IUPAC name of the following complex: [Pt(NH 3) 6] Cl 4 (ii) On the basis of crystal field theory, write the…2022
• Write the IUPAC name of the following complex: K 3[Cr(C 2 O 4) 3] On the basis of crystal field theory, write the electronic…2022
• (i) On the basis of crystal field theory, write the electronic configuration for d^4 ion if Δ 0<P. (ii) Using valence bond…2022asked 3×
• (i) Write the electronic configuration of d^4 on the basis of crystal field splitting theory if Δ 0 P. (ii) [Co(NH 3) 6]^3+ is an…2022
• (i) Write the electronic configuration of d^4 on the basis of crystal field splitting theory, if Δ 0<P. (ii) [Ni(CN) 4]^2- with…2022
• (i) Write the electronic configuration of d^5 on the basis of crystal field splitting theory if Δ 0<P. (ii) [Fe(CN) 6]^3- is…2022
• (i) Write the IUPAC name of the following complex: K 2[PdCl 4] (ii) Using crystal field theory, write the electronic…2022
• Using valence bond theory, predict the hybridization and magnetic character of the complex: [Ni(CO) 4] (Atomic number: Ni=28 )…2022
• Using valence bond theory, predict the hybridization and magnetic character of following: [CoF 6]^3-[ Atomic number of Co=27]…2022asked 2×

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