When 0.1 mol CoCl₃(NH₃)₅ is treated with an excess of AgNO₃, 0.2 mol of AgCl are obtained. The conductivity of the solution will correspond to-

1. 1:3 electrolyte

2. 1:2 electrolyte

3. 1:1 electrolyte

4. 3:1 electrolyte

When 1 mole of ${\mathrm{CrCl}}_{3}6{\mathrm{H}}_2\mathrm{O}$ is treated with excess of ${\mathrm{AgNO}}_3,$ 3 moles of ${\mathrm{AgCl}}_{}$ are obtained. The formula of the complex is:

1. [CrCl₃(H₂O)₃].3H₂O
2. [CrCl₂(H₂O)₄]Cl.2H₂O
3. [CrCl₃(H₂O)₅]Cl₂.H₂O
4. [Cr(H₂O)₆]Cl₃

The correct IUPAC name of [Pt(NH₃)${}_2$Cl${}_2$] is

1. Diamminedichloridoplatinum (ll)

2. Diamminedichloridoplatinum (lV)

3. Diamminedichloridoplatinum (0)

4. Dichloridodiammineplatinum (lV)

The stabilization of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

IUPAC name of $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2\mathrm{Cl}\right({\mathrm{NO}}_2\left)\right]$ is-

1. Platinum diaminechloronitrite

2. Chloronitrito-N-ammineplatinum (ll)

3. Diamminechloridonitrito-N-platinum (ll)

4. Diamminechloronitrito-N-platinate (ll)

Which of the following complex is/are homoleptic:

a. \( {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}} \)
b. \( {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+}} \)
c. \( {\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}}\)
d. \(\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]\)
Choose the correct option.
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Which of the following complexes is/are heteroleptic?

(a) ${\left[Co{\left(N{H}_3\right)}_6\right]}^{3+}$

Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)

Match the compounds given in Column I with the oxidation state of

cobalt has given in column II and assigns the correct code.

Codes

          A          B          C           D

1.       2          3           4           1

2.       3          1           5           2

3.       5          4           3           2

4.       4          1           2           3