NEET Coordination Compounds — Set 10

Question 1

How many moles of $ \ce{AgCl} $ precipitate when 1 mole of $ \ce{[Cr(H2O)5Cl]Cl2} $ reacts with excess $ \ce{AgNO3} $?

Accepted Answer

In $ \ce{[Cr(H2O)5Cl]Cl2} $, the 2 $ \ce{Cl^-} $ ions outside the coordination sphere are ionizable and form $ \ce{AgCl} $, while the inner $ \ce{Cl} $ is a ligand. Thus, 2 moles precipitate.

Question 2

How many electrons occupy the $ t_{2g} $ orbitals in $ \ce{[Cr(NH3)6]^3+} $? (Cr atomic number = 24)

Accepted Answer

Cr$^{3+}$ ($ d^3 $) in $ \ce{[Cr(NH3)6]^3+} $ (octahedral) with moderate field $ \ce{NH3} $ has $ t_{2g}^3 $, so 3 electrons.

Question 3

What is the total number of donor atoms in the ligands of $ \ce{[Ni(en)(NH3)2(H2O)]^2+} $?

Accepted Answer

en (bidentate) has 2 donor atoms, 2 $ \ce{NH3} $ (unidentate) have 2, and 1 $ \ce{H2O} $ (unidentate) has 1. Total = 2 + 2 + 1 = 5.

NEET Chemistry: Coordination Compounds — Practice Set 10

Q1. How many moles of \( \ce{AgCl} \) precipitate when 1 mole of \( \ce{[Cr(H2O)5Cl]Cl2} \) reacts with excess \( \ce{AgNO3} \)?

Q2. How many electrons occupy the \( t_{2g} \) orbitals in \( \ce{[Cr(NH3)6]^3+} \)? (Cr atomic number = 24)

Q3. What is the total number of donor atoms in the ligands of \( \ce{[Ni(en)(NH3)2(H2O)]^2+} \)?

Q4. What is the color of \( \ce{[Ti(H2O)6]^3+} \) in aqueous solution?

Q5. How many moles of \( \ce{AgCl} \) are precipitated when 1 mole of \( \ce{[CoCl(NH3)5]Cl2} \) is treated with excess \( \ce{AgNO3} \)?

Q6. What is the IUPAC name of \( \ce{[Cr(H2O)4Cl2]NO3} \)?

Q7. What is the geometry of \( \ce{[Cu(NH3)4]^2+} \)?

Q8. Which ligand causes the largest crystal field splitting in a tetrahedral field?

Q9. Which complex has a square planar geometry due to strong field ligands?

Q10. How many unpaired electrons are present in \( \ce{[CoF6]^3-} \)? (Co atomic number = 27)