NEET Coordination Compounds — Set 17

Question 1

The EAN of Ni in $ \ce{[Ni(en)2]^2+} $ is: (Ni atomic number = 28)

Accepted Answer

Ni$^{2+}$ with 2 en ligands (4 donor atoms). EAN = 28 - 2 + 2 × 4 = 34.

Question 2

The hybridization of iron in $ \ce{[Fe(H2O)6]^2+} $ is:

Accepted Answer

$ \ce{[Fe(H2O)6]^2+} $ (Fe$^{2+}$, $ d^6 $) is octahedral with weak field $ \ce{H2O} $, forming a high-spin complex with outer orbitals ($ sp^3d^2 $).

Question 3

Which complex can exist as a pair of enantiomers?

Accepted Answer

$ \ce{[Co(en)3]^3+} $ (octahedral) with 3 bidentate en ligands lacks symmetry, forming non-superimposable mirror images (enantiomers).

NEET Chemistry: Coordination Compounds — Practice Set 17

Q1. The EAN of Ni in \( \ce{[Ni(en)2]^2+} \) is: (Ni atomic number = 28)

Q2. The hybridization of iron in \( \ce{[Fe(H2O)6]^2+} \) is:

Q3. Which complex can exist as a pair of enantiomers?

Q4. How many unpaired electrons are present in \( \ce{[Ni(NH3)6]^2+} \)? (Ni atomic number = 28)

Q5. Which complex is colored due to a d-d transition?

Q6. The magnetic moment of \( \ce{[FeF6]^3-} \) is approximately: (Fe atomic number = 26)

Q7. How many moles of \( \ce{AgCl} \) precipitate when 1 mole of \( \ce{[Cr(NH3)4Cl2]Cl} \) reacts with excess \( \ce{AgNO3} \)?

Q8. What is the primary valence of Fe in \( \ce{[Fe(H2O)6]SO4} \)?

Q9. Which complex has a tetrahedral geometry and is paramagnetic?

Q10. What is the primary valence of Co in \( \ce{[CoCl2(NH3)4]Cl} \)?