Consider the following electronic configuration of an element (P) :

                 [Xe]4f¹⁴5d¹6s² 

Then correct statement about element 'P' is :

1. It belongs to 6th period and 1st group

2. It belongs to 6th period and 2nd group

3. It belongs to 6th period and 3rd group

4. None of the above

If IUPAC name of an element is "unununium" then correct statement regarding element is:

Which property decreases from left to right across the periodic table and increases from top to bottom?

Choose the correct option:
1. (i) only

2. (i), (ii) and (iii)

3. (i), (iii) and (iv)

4. (i) and (iv)

The first, second and third ionisation energies (E₁, E₂ and E₃) for an element are 7 eV, 12.5 eV and 42.5 eV respectively. The most stable oxidation state of the element will be:

1. +1

2. +4

3. +3

4. +2

The order of ionisation potential between He⁺ ion and H-atom (both species are in gaseous state) is :

1. I.P(He⁺ ) = I.P (H)

2. I.P(He⁺ ) < I.P (H)

3. I.P(He⁺ ) > I.P (H)

4. Cannot be compared

Second ionisation potential of Li, Be and B is in the order:

1. Li > Be > B

2. Li > B > Be

3. Be > Li > B

4. B > Be > Li

Which of the following isoelectronic ion has the lowest ionization energy?

1. K⁺

2. Cl^-

3. Ca²⁺

4. S^2-

Which of the following is arranged in order of increasing radius ?

1. K⁺ (aq) < Na⁺ (aq) < Li⁺(aq)

2. Na⁺(aq) < K⁺ (aq) < Li⁺ (aq)

3. K⁺(aq) < Li⁺(aq) < Na⁺(aq)

4. Li⁺(aq) < Na⁺(aq) < K⁺(aq)

Which of the following processes involves absorption of energy?

1. $\mathrm{S}\left(\mathrm{g}\right)+{\mathrm{e}}^{-}\to {\mathrm{S}}^{-}\left(\mathrm{g}\right)$

2. ${\mathrm{S}}^{-}+{\mathrm{e}}^{-}\to {\mathrm{S}}^{2-}\left(\mathrm{g}\right)$

3. $\mathrm{Cl}\left(\mathrm{g}\right)+{\mathrm{e}}^{-}\to {\mathrm{Cl}}^{-}\left(\mathrm{g}\right)$

4. None of the above

Arrange N, O and S in order of decreasing electron affinity:

1. S > O > N

2. O > S > N

3. N > O > S

4. S > N > O