Iron does not get oxidised in:

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

1. Cr

2. Mn

3. Fe

4. V

The configuration that shows the outer transition element among the following is:

1. [Rn]7s²

2. [Xe]4f⁷5d¹6s²

3. [Xe]5d¹6s²

4. [Rn]5f⁷6d¹7s²

Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d⁵: Atomic number for the element X is :

1. 25

2. 26

3. 27

4. 24

A set of ions among the following that have a 3d² electronic configuration is:

1. ${\mathrm{Ti}}^{+},{\mathrm{V}}^{4+},{\mathrm{Cr}}^{6+},{\mathrm{Mn}}^{7+}$

2. ${\mathrm{Ti}}^{4+},{\mathrm{V}}^{3+},{\mathrm{Cr}}^{2+},{\mathrm{Mn}}^{3+}$

3. ${\mathrm{Ti}}^{2+},{\mathrm{V}}^{3+},{\mathrm{Cr}}^{4+},{\mathrm{Mn}}^{5+}$

4. ${\mathrm{Ti}}^{3+},{\mathrm{V}}^{2+},{\mathrm{Cr}}^{3+},{\mathrm{Mn}}^{4+}$

Colourless ion among the following is:

Which of the following is a coloured and paramagnetic compound?

1. CuF₂

2. K₂Cr₂O₇

3. $KMn{O}_4$

4. K₄[Fe(CN)₆]

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

A pair among the following that have the same size is:

1. Fe²⁺, Ni²⁺

2. Zr⁴⁺, Ti⁴⁺

3. Zr⁴⁺ , Hf⁴⁺

4. Zn²⁺, Hf⁴⁺

Which of the following elements has the highest second ionization enthalpy ?

1. Cr

2. Mn

3. Fe

4. Ti