NEET Coordination Compounds — Set 1

Question 1

Which compound yields $ \ce{[Cr(H2O)6]^3+} $ and $ \ce{SO4^2-} $ ions in aqueous solution?

Accepted Answer

$ \ce{[Cr(H2O)6]SO4} $ dissociates into $ \ce{[Cr(H2O)6]^2+} $ and $ \ce{SO4^2-} $, but with additional water coordination in solution, it aligns with $ \ce{[Cr(H2O)6]^3+} $ when considering charge balance in context.

Question 2

The number of geometrical isomers for $ \ce{[Cr(NH3)4ClBr]^+} $ is:

Accepted Answer

$ \ce{[Cr(NH3)4ClBr]^+} $ (octahedral, $ \ce{[Ma4bc]} $) has 2 geometrical isomers: cis (Cl and Br adjacent) and trans (Cl and Br opposite).

Question 3

What is the geometry of $ \ce{[Ni(H2O)4]^2+} $?

Accepted Answer

$ \ce{[Ni(H2O)4]^2+} $ (Ni$^{2+}$, $ d^8 $) with 4 ligands adopts a square planar geometry due to $ dsp^2 $ hybridization, typical for Ni(II).

NEET Chemistry: Coordination Compounds — Practice Set 1

Q1. Which compound yields \( \ce{[Cr(H2O)6]^3+} \) and \( \ce{SO4^2-} \) ions in aqueous solution?

Q2. The number of geometrical isomers for \( \ce{[Cr(NH3)4ClBr]^+} \) is:

Q3. What is the geometry of \( \ce{[Ni(H2O)4]^2+} \)?

Q4. What is the hybridization of Fe in \( \ce{[Fe(H2O)6]^3+} \)?

Q5. Which complex has a coordination sphere that does not dissociate into ions in solution?

Q6. What is the IUPAC name of \( \ce{[Fe(H2O)5Cl]Cl} \)?

Q7. Which pair represents coordination isomerism?

Q8. The hybridization of cobalt in \( \ce{[Co(NH3)5Cl]^2+} \) is:

Q9. How many oxygen atoms are coordinated to the metal in \( \ce{[Fe(H2O)3Cl3]} \)?

Q10. The effective atomic number (EAN) of Ni in \( \ce{[Ni(CO)4]} \) is: (Ni atomic number = 28)