NEET Coordination Compounds — Set 3

Question 1

Which complex has the smallest crystal field splitting energy ($ \Delta_o $) among the following?

Accepted Answer

$ \ce{[FeCl6]^4-} $ has $ \ce{Cl^-} $, the weakest field ligand in the spectrochemical series ($ \ce{Cl^-} < \ce{H2O} < \ce{NH3} < \ce{CN^-} $), giving the smallest $ \Delta_o $.

Question 2

What is the IUPAC name of $ \ce{[Ni(H2O)2(NH3)2Cl2]} $?

Accepted Answer

Ligands are named alphabetically: ammine ($ \ce{NH3} $), aqua ($ \ce{H2O} $), chlorido ($ \ce{Cl} $). Ni is +2 (neutral complex). Name: diamminediaquadichloridonickel(II).

Question 3

The number of geometrical isomers for $ \ce{[Ni(NH3)2(H2O)2Cl2]} $ is:

Accepted Answer

$ \ce{[Ni(NH3)2(H2O)2Cl2]} $ (octahedral, $ \ce{[Ma2b2c2]} $) has 3 geometrical isomers: all cis, cis-trans-cis, and all trans arrangements.

NEET Chemistry: Coordination Compounds — Practice Set 3

Q1. Which complex has the smallest crystal field splitting energy (\( \Delta_o \)) among the following?

Q2. What is the IUPAC name of \( \ce{[Ni(H2O)2(NH3)2Cl2]} \)?

Q3. The number of geometrical isomers for \( \ce{[Ni(NH3)2(H2O)2Cl2]} \) is:

Q4. Which complex has a coordination number of 6 and exhibits geometrical isomerism?

Q5. How many ligands in \( \ce{[Cr(en)2(H2O)Cl]^2+} \) are bidentate?

Q6. Which complex follows Werner’s theory by having a primary valence satisfied by sulfate ions?

Q7. The magnetic moment of \( \ce{[FeF6]^3-} \) is approximately: (Fe atomic number = 26)

Q8. The magnetic moment of \( \ce{[Cr(H2O)6]^3+} \) is approximately: (Cr atomic number = 24)

Q9. The magnetic moment of \( \ce{[CoCl4]^2-} \) is approximately: (Co atomic number = 27)

Q10. Which complex has a higher crystal field splitting energy (\( \Delta_o \)) with \( \ce{CN^-} \) ligands compared to \( \ce{NH3} \) ligands?