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)

Identify the correct statements for the behaviour of ethane -1, 2- diamine as a ligand.

(a) It is a neutral ligand

(b) It is a didentate ligand

(c) It is a chelating ligand

(d) It is a unidentate ligand

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

Which of the following complexes show linkage isomerism?

$\left(\mathrm{a}\right)\hspace{0.17em}{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{NO}}_2\right)\right]}^{2+}$
$\left(\mathrm{b}\right) [\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{CO}{]}^{3+}$
$\left(\mathrm{c}\right) [\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_5\mathrm{SCN}{]}^{2+}$
$\left(\mathrm{d}\right) {\left[\mathrm{Fe}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]}^{+}$

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

Match the complex ions give in Column I with the colours given in column II and assign the correct code.

Codes

Match the coordination given in Column I with the central metal atoms given in Column II and assign the correct code.

Codes
 

 Match the complex ions given in Column I with the hybridization and number of unpaired electrons given in Column II and assign the correct code. 

Codes 

Match the complex species given in Column I with the possible isomerism given in Column II and assign 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

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

Assertion (A): $\left[Cr\left(H_2{\mathrm{O}}_6\right)\right]C{l}_2$ and $\left[Fe{\left(H_2\mathrm{O}\right)}_6\right]C{l}_2$ are reducing in nature.

Reason (R): Unpaired electrons are present in their d-orbitals.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but reason is true.