NEET Coordination Compounds — Set 12

Question 1

Which of the following ligands is ambidentate?

Accepted Answer

$ \ce{NO2^-} $ can bind via N (nitro) or O (nitrito), making it ambidentate, unlike unidentate $ \ce{H2O} $ or $ \ce{NH3} $.

Question 2

What is the oxidation state of Fe in $ \ce{[Fe(H2O)5NO]^+} $?

Accepted Answer

In $ \ce{[Fe(H2O)5NO]^+} $, $ \ce{NO} $ is $ \ce{NO^+} $ (+1), 5 $ \ce{H2O} $ are neutral. Charge = +1, so $ x + 0 + 1 = +1 $, $ x = 0 $ is incorrect; typically Fe is +2 with $ \ce{NO^+} $, adjusting context.

Question 3

The hybridization of the central metal ion in $ \ce{[Ni(CO)4]} $ is:

Accepted Answer

$ \ce{[Ni(CO)4]} $ is tetrahedral (Ni in 0 oxidation state, $ d^{10} $). It uses 4 orbitals from 4s and 4p, forming $ sp^3 $ hybrid orbitals to bond with 4 $ \ce{CO} $ ligands.

NEET Chemistry: Coordination Compounds — Practice Set 12

Q1. Which of the following ligands is ambidentate?

Q2. What is the oxidation state of Fe in \( \ce{[Fe(H2O)5NO]^+} \)?

Q3. The hybridization of the central metal ion in \( \ce{[Ni(CO)4]} \) is:

Q4. Which complex has more geometrical isomers than \( \ce{[Co(NH3)4Cl2]^+} \)?

Q5. Which complex has a \( d^6 \) metal ion that remains paramagnetic even with strong field ligands in an octahedral field?

Q6. How many nitrogen atoms are directly bonded to the metal in \( \ce{[Co(NH3)4(en)]^3+} \)?

Q7. The magnetic moment of \( \ce{[Ni(H2O)6]^2+} \) is approximately: (Ni atomic number = 28)

Q8. What is the IUPAC name of \( \ce{[Cr(NH3)3(H2O)Cl2]Br} \)?

Q9. Which complex absorbs light in the visible region due to d-d transition?

Q10. The hybridization of nickel in \( \ce{[NiCl4]^2-} \) is: