Coordination Compounds - Quiz 1

Coordination Compounds Quiz-1

Dear Readers,

JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions..

Q1. 

•  3
•  6
•  4
•  5

Solution
(a)

Q2. 
What type of isomerism is present in the pair of complexes [Co(NH₃ )₅ Br]SO₄ and [Co(NH₃)₅ SO₄ ]Br

•  Linkage isomerism
•  Ligand isomerism
•  Ionisation isomerism
•  Coordination isomerism

Solution
(c)

Q3. Test tube I contains (aq) KI, II contains (aq)HgCl₂,III contains mixture of I and II in 4:1 ratio, Select the correct statement

•  I and III give test for I^- and K^+
•  II and III both give test for Hg^(2+)
•  Both (a) and (b) are correct
•  None of the above is correct

Solution

Q4. 
The number of unpaired electrons expected for the complex ion[Cr(NH₃ )₆ ]²⁺

•  2
•  3
•  4
•  5

Solution
(a)NH_3is a strong ligand thus, by (CFSE),

Q5.Isomerisms exhibited by [Cr(NH₅ )₂ (H₂ O)₂ Cl₂ ]⁺ are

•  Ionisation, optical
•  Hydrate, optical
•  Eometrical, optical
•  Coordinate, geometrical

Solution
(c) Enatiomer are non-superimposable Thus, geometrical and optical isomer

Q6. The complex showing a spin-only magnetic moment of 2.82 BM is

•  Ni(CO)₄
•  [NiCl₄ ]^2-
• Ni(PPh₃ )₄
•  [Ni(CN)₄]^2-

Solution
(b) Since, Cl is a weak field ligand, it doesn’t cause paring of electron.

Q7.
The complex showing a spin-only magnetic moment of 2.82 BM is

•  Ni(CI)₄
•  [NiCl₄ ]^2-
•  Ni(PPh₃ )₄
•  [Ni(CN)₄]^2-

Solution
(b)

Q8.Consider the following complex, ions, P,Q and R P=[FeF₆ ]^3-, Q=[V(H₂O)₆ ]²⁺ and R=[Fe(H₂ O)₆ ]²⁺ The correct order of the complex ions, according to their spin-only magnetic moment values (in BM) is

•  R< Q< P
•  Q< R< P
•  R < P
•  Q < P

Solution
(b)

Q9.[Ni(CN)₄ ]^2-and [NiCl₄ ]^2- have similarity but not in

•  Magnetic moment
•  C.N. and O.N
•  Structure
•  Both (a) and (c)

Solution
(d)

Q10. 
Consider the following statements in respect of [CoCl₆ ]^4- complex ion
I. It is paramagnate
II. It is low-spin complex
III. Oxidation number of cobalt is -4
IV. The coordination number of cobalt is 6
Select the correct statement

•  All of the above
•  III and IV only
•  I and IV only
• I and IV only

Solution
(c)It is thus paramagnetic and high spin complex Thus, (I) and (IV) are correct