CBSE Class 12 Chemistry Coordination Compounds Worksheet Set A

Question. Which one is the most likely structure of CrCl₃.
6H₂O if 1/3 of total chlorine of the compound is precipitated by adding AgNO₃
(a) CrCl₃.6H₂O
(b) [Cr(H₂O)₃Cl₃].(H₂O)₃
(c) [CrCl₂(H₂O)₄] Cl.₂H₂O
(d) [CrCl(H₂O)₅] Cl₂.H₂O
Answer : C

Question. Which of the following coordination compounds will give precipitate with an aqueous solution of AgNO₃? 
(a) [Cr(NH₃)₆]Cl₃
(b) [Cr(NH₃)₃Cl₃]
(c) [Cr(NH₃)₅Cl]SO₄
(d) Na₃[Cr(CN)₆]
Answer : A

Question. Oxidation state of “V” in Rb₄K[HV₁₀O₂₈] is
(a) + 5
(b) + 6
(c) +(7/5)
(d) + 4
Answer : A

Question. Which of the following complex will show geometrical as well as optical isomerism (en=ethylenediammine)
(a) Pt(NH₃)₂Cl₂
(b) [Pt(NH₃)Cl₄]
(c) [Pt(en)₃]⁴⁺
(d) [Pt(en)₂Cl₂]
Answer : D

Question. The octahedral complex CoSO₄Cl.5 NH₃ exists in two isomeric fonns X and Y. Isomer X reacts with AgNO₃ to give a white precipitate, but does not react with BaCl_2. Isomer Y gives white precipitate with BaC_l2 but does not react with AgNO_3. Isomers X and Y are
(a) ionization isomers
(b) linkage isomers
(c) coordination isomers
(d) solvate isomers
Answer : A

Question. Which one of the following has the highest molar conductivity?
(a) Diamminedichloroplatinum (II)
(b) Tetraamminedichlorocobalt (III) chloride
(c) Potassium hexacyanoferrate (II)
(d) Hexaaquachromium (III) chloride
Answer : C

Question. The complex that can exhibit linkage isomerism is
(a) [Co(NH₃)₅(H₂O)]CI₃
(b) [Co(NH₃)₅(NO₂)]C1₂
(c) [Co(NH₃)₅(NO₃)](NO₃)₂
(d) [Co(NH₃)₅Cl]SO₄
Answer : B

Question. The complex having the highest spin only magnetic moment is
(a) [Fe(CN)₆]^3–
(b) [Fe(H₂O)₆]²⁺
(c) [MnF_6]^4–
(d) [NiCl⁴]^2–
Answer : C

Question. For an octahedral complex MX₄Y₂ (M = a transition metal, X and Y are monodentate achiral ligands), the correct statement, among the following, is
(a) MX₄Y₂ has 2 geometrical isomers one of which is chiral.
(b) MX₄Y₂ has 2 geometrical isomers both of which are achiral.
(c) MX₄Y₂ has 4 geometrical isomers all of which are achiral. 
(d) MX₄Y₂ has 4 geometrical isomers two of which are chiral.
Answer : B

Question. Among the following, the pair of paramagnetic complexes is
(a) K₃[Fe(CN)₆] and K₃ [CoF₆]
(b) K₃[Fe(CN)₆] and [Co(NH₃)₆]Cl₃
(c) K₄[Fe(CN)₆] and K₃[CoF₆]
(d) K₄[Fe(CN)₆] and [Co(NH₃)₆]Cl₃
Answer : A

Question. Which of the following complexes does not show the geometric isomerism ?
(a) Pt(NH₃)₂Cl₂
(b) [Pt(NH₃) (NH₂OH)(NO₂) (C₆H₅N)] NO₂
(c) Pt(NH₂CH₂COO)₂
(d) [Cu(NH_{3 )}4 ]Cl₂
Answer : D

Question. [Co(NH₃)₄(NO₂)₂]Cl exhibits
(a) linkage isomerism, ionization isomerism and geometrical isomerism
(b) ionization isomerism, geometrical isomerism and optical isomerism
(c) linkage isomerism, geometrical isomerism and optical isomerism
(d) linkage isomerism, ionization isomerism and optical isomerism
Answer : A

Question. Low spin complex of d 6-cation in an octahedral field will have the following energy :
(a) (-12/5)Δ_o + P
(b) (-12/5)Δ_o + 3P
(c) (-2/5)Δ_o + 2P
(d) (-2/5)Δ_o + P
()Δ_o = Crystal Field Splitting Energy in an octahedral field, P = Electron pairing energy)
Answer : B

Question. K₃[Al(C₂O₄)₃] is called
(a) Potassium aluminooxalate
(b) Potassium trioxalatoaluminate (III)
(c) Potassium aluminium (III) oxalate
(d) Potassium trioxalatoaluminate (VI)
Answer : B

Question. When AgNO₃ is added to a solution of Co(NH₃)5Cl₃, the precipitate of AgCl shows two ionizable chloride ions. This means :
(a) Two chlorine atoms satisfy primary valency and one secondary valency
(b) One chlorine atom satisfies primary as well as secondary valency
(c) Three chlorine atoms satisfy primary valency
(d) Three chlorine atoms satisfy secondary valency
Answer : A

Question. In which of the following pairs both the complexes show optical isomerism ?
(a) cis-[Cr(C₂O₄)₂Cl₂]³⁺, cis [Co(NH₃)₄Cl₂]
(b) [Co(en)₃]Cl₃, cis-[Co(en)₂Cl₂]Cl
(c) [PtCl(dien)]Cl, [NiCl₂Br₂]_2-
(d) [Co(NO₃)₃(NH₃)₃], cis - [Pt(en)₂Cl₂]
Answer : B

Question. The tetrahedral [CoI₄]^2- and square planar [Pd Br₄ ]^2- complex ions are respectively
(a) low spin, high spin
(b) high spin, low spin
(c) both low spin
(d) both high spin
Answer : B

Question. Crystal field stabilization energy for high spin d⁴ octahedral complex is:
(a) – 1.8 Δ_o
(b) – 1.6 Δ_o + P
(c) – 1.2 Δ_o
(d) – 0.6 Δ_o
Answer : D

Question. When 0.01 mole of a cobalt complex is treated with excess silver nitrate solution, 4.305 g silver chloride is precipitated. The formula of the complex is
(a) [Co(NH₃)₃Cl₃]
(b) [Co(NH₃)₅Cl]Cl₂
(c) [Co(NH₃)₆]Cl₃
(d) [Co(NH₃)4Cl_2]NO₃
Answer : C

Question. In which of the following octahedral complex species the magnitude of Do will be maximum ?
(a) [Co(H₂O)₆]²⁺
(b) [Co(CN)₆]^3-
(c) [Co(C₂O₄)₃]^3-
(d) [Co (NH₃)₆]³⁺
Answer : B

Numeric Value Answer

Question. The number of unpaired electrons in the complex ion [CoF₆]^3– is (Atomic no.: Co = 27)
Answer : 4

Question. The possible number of isomers of the complex [MCl₂Br₂]SO₄ is ________.
Answer : 4

Question. The total number of coordination sites in ethylenediaminetetraacetate (EDTA^4–) is ______.
Answer : 6

Question. Considering that D0 > P, the magnetic moment (in BM) of [Ru(H₂O)₆]²⁺ would be __________.
Answer : 0.0

Question. The volume (in mL) of 0.125 M AgNO₃ required to quantitatively precipitate chloride ions in 0.3 g of [Co(NH₃)₆]Cl₃ is _______.
M[Co(NH₃)₆]Cl₃ = 267.46 g/mol
A_^gNO3 M = 169.87 g/mol
Answer : 26.92 

CBSE Class 12 Chemistry Coordination Compounds Worksheet Set A

             Very Short Answer

Q1)       What is coordination entity?

Q2)       What is coordination compounds?

Q3)       Who proposed the concept of the primary valence and secondary valence?

Q4)       What is coordination polyhedral?

Q5)       Who formulate the ideas about the structures of the coordination compounds?

              Short Answer

Q6)       What is counter ions?

Q7)       Distinguish between primary valence and secondary valence?

Q8)       What do you mean by the central atom or ion?

Q9)       What do you understand by coordination number?

Q10)     What do you meant by coordination sphere and coordination polyhedron?

              Long Answer

Q11)     What are the rules used in naming coordination compounds?

Q12)     What are the main postulates of the coordination compounds?

Q13)     State the difference between double salt and complex salt?

Q14)     What are the rules are applied while writing formulas of mononuclear coordination entities?

Q15)     Explain about ligands?

Please click on below link to download CBSE Class 12 Chemistry Coordination Compounds Worksheet Set A