Mn²⁺ compounds are more stable than Fe²⁺ compounds towards oxidation in their +3 state because

1. 3d⁵ configuration is more stable than 3d⁶ configuration.

2. 3d⁶ configuration is more stable than 3d⁵ configuration.

3. 3p⁵ configuration is less stable than 3p⁶ configuration.

4. 3p⁶ configuration is less stable than 3p⁵ configuration.

Transition metals show paramagnetic behaviour due to:

1. Paired electrons in the (n-1) d-orbitals

2. Unpaired electrons in the (n-1) d-orbitals

3. Due to ${\mathrm{d}}^{10}, \mathrm{and} {\mathrm{d}}^0$ configuration

4. None of the above

The correct statement(s) about interstitial compounds is/are:

An element among the following that exhibits the maximum oxidation state is:

1. Cr

2. Mn

3. Fe

4. V

Match the properties given in Column I with uses given in Column II 

The d-block elements that may not be regarded as transition elements are

The correct statement(s) regarding the oxidation state of transition elements is/are:

1. The oxidation state can vary from +1 to +7

2. Variable oxidation states are possible.

3. Both (1) and (2) 

4. None of the above

Match the catalysts given in Column I with the processes given in Column II.

Codes

An element that does not show variable oxidation state is:

1. Fe

2. Mn

3. Cu

4. Zn

The correct statement(s) about transition elements is/are: