Coordination Compounds · JEE Main previous year questions

2022 14 questions

1. Q892022 · 29 Jul 2022 · Shift 1· Numerical answer

   $[\mathrm{Fe}(\mathrm{CN}{)}_6{]}^{3-}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is $(-)$ __________ ${\Delta }_0$. (Nearest integer)

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   Answer: 2

2. Q852022 · 29 Jul 2022 · Shift 2· Numerical answer
   
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   Answer: 9

3. Q882022 · 28 Jul 2022 · Shift 1· Numerical answer

   Total number of relatively more stable isomer(s) possible for octahedral complex $[{\text{Cu(en)}}_2(\text{SCN}{)}_2]$ will be _________.

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   Answer: 3

4. Q652022 · 28 Jul 2022 · Shift 2

   Match List I with List II $$\begin{array}{llll}& \text{List - I (Complex)}& & \text{List - II (Hybridization)}\\ \text{(A)}& Ni(CO{)}_4& \text{(I)}& s{p}^3\\ \text{(B)}& [Ni(CN{)}_4{]}^{2-}& \text{(II)}& s{p}^3{d}^2\\ \text{(C)}& [Co(CN{)}_6{]}^{3-}& \text{(III)}& d^{2}s{p}^3\\ \text{(D)}& [Co{F}_6{]}^{3-}& \text{(IV)}& ds{p}^2\end{array}$$ Choose the correct answer from the options given below :

   1. A.A-IV, B-I, C-III, D-II
   2. B.A-I, B-IV, C-III, D-II
   3. C.A-I, B-IV, C-II, D-III
   4. D.A-IV, B-I, C-II, D-III
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   Answer: B

5. Q672022 · 27 Jul 2022 · Shift 2

   Low oxidation state of metals in their complexes are common when ligands :

   1. A.have good $\pi$-accepting character
   2. B.have good $\sigma$-donor character
   3. C.are having good $\pi$-donating ability
   4. D.are having poor $\sigma$-donating ability
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   Answer: A

6. Q612022 · 26 Jul 2022 · Shift 1

   Match List-I with List-II : $$\begin{array}{llll}& \text{List I (Compound)}& & \text{List II (Shape)}\\ \text{(A)}& \mathrm{Br}{\mathrm{F}}_5& \text{(I)}& \text{bent}\\ \text{(B)}& [\mathrm{Cr}{\mathrm{F}}_6{]}^{3-}& \text{(II)}& \text{square pyramidal}\\ \text{(C)}& {\mathrm{O}}_3& \text{(III)}& \text{trigonal bipyramidal}\\ \text{(D)}& \mathrm{PC}{\mathrm{l}}_5& \text{(IV)}& \text{octahedral}\end{array}$$ Choose the correct answer from the options given below :

   1. A.$(\mathrm{A})-(\mathrm{I}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})$
   2. B.$(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{III}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})$
   3. C.$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{III})$
   4. D.$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})$
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   Answer: C

7. Q662022 · 25 Jul 2022 · Shift 2

   The correct order of energy of absorption for the following metal complexes is : A : $[\mathrm{Ni}(\mathrm{en}{)}_3{]}^{2+}$, B : $[\mathrm{Ni}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{2+}$, C : $[\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$

   1. A.$C<B<A$
   2. B.$B<C<A$
   3. C.$C<A<B$
   4. D.$A<C<B$
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   Answer: A

8. Q852022 · 30 Jun 2022 · Shift 1· Numerical answer

   In the following brown complex, the oxidation state of iron is +___________. $[Fe(H_{2}O{)}_6{]}^{2+}+NO\to \underset{\text{Brown complex}}{[Fe(H_{2}O{)}_5(NO){]}^{2+}}+H_{2}O$

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   Answer: 1

9. Q852022 · 28 Jun 2022 · Shift 2· Numerical answer

   $[\mathrm{Fe}(\mathrm{CN}{)}_6{]}^{4-}$ $[\mathrm{Fe}(\mathrm{CN}{)}_6{]}^{3-}$ $[\mathrm{Ti}(\mathrm{CN}{)}_6{]}^{3-}$ $[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$ $[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}$ Among the given complexes, number of paramagnetic complexes is ____.

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   Answer: 2

10. Q652022 · 27 Jun 2022 · Shift 1

    Which of the following will have maximum stabilization due to crystal field?

    1. A.$[\mathrm{Ti}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$
    2. B.$[\mathrm{Co}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$
    3. C.$[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}$
    4. D.$[\mathrm{Cu}(\mathrm{N}{\mathrm{H}}_3{)}_4{]}^{2+}$
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    Answer: C

11. Q672022 · 27 Jun 2022 · Shift 2

    Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : $\text{Mn}=25$; $\text{Fe}=26$) A. $[{\text{FeF}}_6{]}^{3-}$ B. $[\text{Fe}(\text{CN}{)}_6{]}^{3-}$ C. $[{\text{MnCl}}_6{]}^{3-}$ (high spin) D. $[\text{Mn}(\text{CN}{)}_6{]}^{3-}$ Choose the correct answer from the options given below :

    1. A.$\text{A}<\text{B}<\text{D}<\text{C}$
    2. B.$\text{B}<\text{D}<\text{C}<\text{A}$
    3. C.$\text{A}<\text{C}<\text{D}<\text{B}$
    4. D.$\text{B}<\text{D}<\text{A}<\text{C}$
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    Answer: B

12. Q862022 · 26 Jun 2022 · Shift 1· Numerical answer

    The spin-only magnetic moment value of an octahedral complex among $\mathrm{CoC}{\mathrm{l}}_3.4N{\mathrm{H}}_3$, $\mathrm{NiC}{\mathrm{l}}_2.6{\mathrm{H}}_2\mathrm{O}$ and $\mathrm{PtC}{\mathrm{l}}_4.2HCl$, which upon reaction with excess of $\mathrm{AgN}{\mathrm{O}}_3$ gives 2 moles of AgCl is ________ B.M. (Nearest integer)

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    Answer: 3

13. Q882022 · 25 Jun 2022 · Shift 1· Numerical answer

    If $[\mathrm{Cu}({\mathrm{H}}_2\mathrm{O}{)}_4{]}^{2+}$ absorbs a light of wavelength $600\text{ nm}$ for d-d transition, then the value of octahedral crystal field splitting energy for $[\mathrm{Cu}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ will be $\underline{}\times 10^{-21}\text{ J}$. [Nearest Integer] (Given : $h=6.63\times 10^{-34}\text{ Js}$ and $c=3.08\times 10^8{\text{ ms}}^{-1}$)

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    Answer: 766

14. Q682022 · 24 Jun 2022 · Shift 2

    Transition metal complex with highest value of crystal field splitting (${\Delta }_0$) will be :

    1. A.$[\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$
    2. B.$[\mathrm{Mo}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$
    3. C.$[\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$
    4. D.$[\mathrm{Os}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$
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    Answer: D