6. ⇒ (MHT CET 2021 21th September Evening Shift )

Identify cationic complex from following.

A. Na $_{3}$ [AlF $_{6}$ ]

B. [Pt(NH $_{3}$ ) $_{2}$ Cl $_{2}$ ]

C. K $_{4}$ [Fe(CN) $_{6}$ ]

D. [PtBr $_{2}$ (NH $_{3}$ ) $_{4}$ ]Br $_{2}$

Correct Option is (D)

$[{PtBr}_{2} ({NH}_{3})_{4}] {Br}_{2} ⟶ [{PtBr}_{2} ({NH}_{3})_{4}]^{2 +} + 2 {Br}^{-}$

7. ⇒ (MHT CET 2021 21th September Morning Shift )

Identify homoleptic complex from following :

A. $[Co {({NH}_{3})}_{6}] {Cl}_{3}$

B. $[Co {({NH}_{3})}_{4} {Cl}_{2}]$

C. $[Co {({NH}_{3})}_{5} Cl] {SO}_{4}$

D. $[Co (ONO) {({NH}_{3})}_{5} {Cl}_{2}]$

Correct Option is (A)

$[Co {({NH}_{3})}_{6}] {Cl}_{3} \to$ Here, only one type of ligand i.e. ${NH}_{3}$ surrounds the ${Co}^{3 +}$ ion. Hence, it is homoleptic complex.

8. ⇒ (MHT CET 2021 20th September Evening Shift )

Identify neutral complex from following.

A. ${Na}_{3} [{AlF}_{6}]$

B. $[Co {({NO}_{2})}_{3} {({NH}_{3})}_{3}]$

C. ${[Cu {({NH}_{3})}_{4}]}^{2 +}$

D. ${[Fe (CN)_{6}]}^{4 -}$

Correct Option is (B)

(A) ${Na}_{3} [{AlF}_{6}]$ - Anionic

(B) $[Co {({NO}_{2})}_{3} {({NH}_{3})}_{3}] -$ Neutral

(C) ${[Cu {({NH}_{3})}_{4}]}^{2 +}$ - Cationic

(D) ${[Fe (CN)_{6}]}^{4 -}$ - Anionic

9. ⇒ (MHT CET 2021 20th September Morning Shift )

Which among the following statements is true for Pt[(NH $_{3}$ ) $_{2}$ Cl $_{2}$ ] ?

A. It is a neutral complex.

B. In this complex chlorine atoms are in ionization sphere.

C. The coordination number of Pt in this complex is 2.

D. The oxidation state of Pt in this complex is +4.

Correct Option is (A)

Pt[(NH $_{3}$ ) $_{2}$ Cl $_{2}$ ] $\to$ It is a neutral complex. In this complex, chlorine atoms are in coordination sphere. Coordination number of Pt = 4, oxidation state of Pt = +2.

⇒Coordination_compound