Match the following isoelectronic species in Column I and Column II: 

	Column I		Column II
i.	${\mathrm{F}}^{-}$	a.	${\mathrm{Br}}^{-}$
ii.	Ar	b.	${\mathrm{Si}}^{2+}$
iii.	$\mathrm{Mg}$	c.	${\mathrm{O}}^{2-}$
iv.	${\mathrm{Rb}}^{+}$	d.	${\mathrm{S}}^{2-}$

 

	i	ii	iii	iv
1.	b	c	a	d
2.	c	b	a	d
3.	c	d	b	a
4.	b	c	d	a

The correct order of ionization energy of W, X, Y and Z is-

Consider the following curves:

X represents group with highest atomic radius. The element that belongs to Y group can be : 

In the following graph of variation of ionization energy with atomic number, X, Y, and Z represent elements.

The group number of X, Y, and Z elements is:

The graph between ionization energy and atomic number for the first group elements is shown below:

The element represented by Y in the graph above is:

1. Cs 

2. Rb

3. Ca

4.  K

Abnormally high ionization enthalpy of B as depicted in the graph below can be due to : 

1. Completely filled 2p subshell.

2. Completely filled 2s subshell.

3. Completely filled 3d subshell.

4. Completely filled 4f subshell.

The correct graph depicting ionization energies for 2^nd period elements is:

1.
2.
3.
4.	None of the above

Correct statement among the following regarding P, S, Cl, F is :

The formula of a compound that is formed by the Aluminium and Sulphur is:

The ionic radii vary in :

Choose the correct option :

1. (a), (c)

2. (b), (c)

3. (c), (d)

4. (b), (d)