Match List–I with List–II. Primary valency and Secondary valency [2025]

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Q.
Match List–I with List–II. [2025]

List-I List–II

Complex Primary valency and Secondary valency

A. $[{Co(en)}_{2} {Cl}_{2}] Cl$ I. 3 6

B. $[Pt {({NH}_{3})}_{2} Cl({NO}_{2})]$ II. 3 4

C. $Hg [{Co(SCN)}_{4}]$ III. 2 6

D. ${[Mg(EDTA)]}^{2 -}$ IV. 2 4

Choose the correct answer from the options given below:

1 (A)–(III), (B)–(I), (C)–(II), (D)–(IV)

2 (A)–(I), (B)–(IV), (C)–(II), (D)–(III)

3 (A)–(I), (B)–(III), (C)–(II), (D)–(IV)

4 (A)–(II), (B)–(III), (C)–(IV), (D)–(I)

Ans.
(2)

Complex Primary valency = Oxidation number Secondary valency = Coordination number

(A)   $[Co {(en)}_{2} {Cl}_{2}] Cl$ 3 6

(B)   $[Pt {({NH}_{3})}_{2} {ClNO}_{2}]$ 2 4

(C)   $Hg [Co {(SCN)}_{4}]$ 3 4

(D)   ${[Mg (EDTA)]}^{2 -}$ 2 6

Solution

1 (A)–(III), (B)–(I), (C)–(II), (D)–(IV)

2 (A)–(I), (B)–(IV), (C)–(II), (D)–(III)

3 (A)–(I), (B)–(III), (C)–(II), (D)–(IV)

4 (A)–(II), (B)–(III), (C)–(IV), (D)–(I)

Ans.
(2)

Complex Primary valency = Oxidation number Secondary valency = Coordination number

(A)   $[Co {(en)}_{2} {Cl}_{2}] Cl$ 3 6

(B)   $[Pt {({NH}_{3})}_{2} {ClNO}_{2}]$ 2 4

(C)   $Hg [Co {(SCN)}_{4}]$ 3 4

(D)   ${[Mg (EDTA)]}^{2 -}$ 2 6

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	List-I		List–II
	Complex		Primary valency and Secondary valency
A.	$[{Co(en)}_{2} {Cl}_{2}] Cl$	I.	3 6
B.	$[Pt {({NH}_{3})}_{2} Cl({NO}_{2})]$	II.	3 4
C.	$Hg [{Co(SCN)}_{4}]$	III.	2 6
D.	${[Mg(EDTA)]}^{2 -}$	IV.	2 4

Complex	Primary valency = Oxidation number	Secondary valency = Coordination number
(A) $[Co {(en)}_{2} {Cl}_{2}] Cl$	3	6
(B) $[Pt {({NH}_{3})}_{2} {ClNO}_{2}]$	2	4
(C) $Hg [Co {(SCN)}_{4}]$	3	4
(D) ${[Mg (EDTA)]}^{2 -}$	2	6

Solution

Q. Match List–I with List–II. [2025] List-I List–II Complex Primary valency and Secondary valency A. [Co(en)2Cl2]Cl I. 3 6 B. [Pt(NH3)2Cl(NO2)] II. 3 4 C. Hg[Co(SCN)4] III. 2 6 D. [Mg(EDTA)]2- IV. 2 4 Choose the correct answer from the options given below:

1 (A)–(III), (B)–(I), (C)–(II), (D)–(IV)

2 (A)–(I), (B)–(IV), (C)–(II), (D)–(III)

3 (A)–(I), (B)–(III), (C)–(II), (D)–(IV)

4 (A)–(II), (B)–(III), (C)–(IV), (D)–(I)

Ans. (2) Complex Primary valency = Oxidation number Secondary valency = Coordination number (A) [Co(en)2Cl2]Cl 3 6 (B) [Pt(NH3)2ClNO2] 2 4 (C) Hg[Co(SCN)4] 3 4 (D) [Mg(EDTA)]2- 2 6

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Ans.
(2)

Complex Primary valency = Oxidation number Secondary valency = Coordination number

(A) $[Co {(en)}_{2} {Cl}_{2}] Cl$ 3 6

(B) $[Pt {({NH}_{3})}_{2} {ClNO}_{2}]$ 2 4

(C) $Hg [Co {(SCN)}_{4}]$ 3 4

(D) ${[Mg (EDTA)]}^{2 -}$ 2 6