JEE MAIN - Chemistry (2025 - 7th April Evening Shift - No. 1)
Match List - I with List - II.
| List - I (Complex) | List - II (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 :
(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
Explanation
Primary valency $=$ Oxidation state
Secondary valency $=$ Co-ordination number
| Complex | Primary valency | Secondary | |
|---|---|---|---|
| (A) | $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Cl}$ | 3 | 6 |
| (B) | $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NO}_2\right)\right]$ | 2 | 4 |
| (C) | $\mathrm{Hg}\left[\mathrm{Co}(\mathrm{SCN})_4\right]$ | 3 | 4 |
| (D) | $[\mathrm{Mg}(\mathrm{EDTA})]^{2-}$ | 2 | 6 |
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