Match the following aspects with the respective metal.

	Aspects		Metal
(a)	The metal which reveals the maximum number of oxidation states	(i)	Scandium
(b)	The metal although placed in a 3d block is not considered as a transition element	(ii)	Copper
(c)	The metal which does not exhibit variable oxidation states	(iii)	Manganese
(d)	The metal which in +1 oxidation state in aqueous solution undergoes disproportionation	(iv)	Zinc

Select the correct option:

Options:	(a)	(b)	(c)	(d)
1.	(i)	(iv)	(ii)	(iii)
2.	(iii)	(iv)	(i)	(ii)
3.	(iii)	(i)	(iv)	(ii)
4.	(ii)	(iv)	(i)	(iii)

Identify the incorrect statement from the following:

Colourless ion among the following is:

The oxo metal anions of the 3d series in which the metal exhibits an oxidation state equal to its group number is /are:

The electronic configuration of the last element of actinoids is :

1. Thorium, Th: $\left[\mathrm{Rn}\right]5{\mathrm{f}}^{14}6{\mathrm{d}}^{1}7{\mathrm{s}}^2$

2. Lawrencium, Lr: $\left[\mathrm{Rn}\right]5{\mathrm{f}}^{14}6{\mathrm{d}}^{1}7{\mathrm{s}}^2$

3. Neptunium, Np: $\left[\mathrm{Rn}\right]5{\mathrm{f}}^{14}6{\mathrm{d}}^{1}7{\mathrm{s}}^2$

4. Protactinium, Pa: $\left[\mathrm{Rn}\right]5{\mathrm{f}}^{14}6{\mathrm{d}}^{1}7{\mathrm{s}}^2$

The correct statement regarding the element silver(Ag) is: 

Match Compound/element in Column-I with uses in Column-II and select the best match from the codes given:

Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:

Codes:

The enthalpy of atomization of transition metals is high due to :

1. High effective nuclear charge

2. A large number of valence electrons

3. Very strong metallic bonds

4. All of the above