Which of the following species has the smallest ionic radius?

1.	Na+	2.	F-
3.	O2-	4.	N3-

 The correct order for electron affinity of halogens is :

1. Br > F

2. F > Cl

3. Br > Cl

4. F > I

Which one of the elements has the highest ionization energy?

1. [Ne]3s²3p¹

2. [Ne]3s²3p²

3. [Ne]3s²3p³

4. [Ar]3d¹⁰4s²4p²

Element/Ion that has the highest electron affinity is:

The correct order of second ionisation energies of B, C, N, & O is

1. O > N > C > B

2. O > C > N > B

3. O > B > C > N

4. O > N >B > C

An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be.

1. A₂X₃

2. AX₃

3. A₃X₂

4. A₂X

Match List-I with List-II and select the correct answer using codes given below:

How does the shielding (screening) effect of d-electrons compare with that of p-electrons?

1. Equal to that of p-electrons

2. Much greater than that of p-electrons

3. Same as that of f-electrons

4. Less than that of p-electrons

Values of electronegativity like 3.0, 2.8, 2.5 are related to :-

(1) Elements having low IP in the periodic table

(2) Elements having high EA in the periodic table

(3) Chalcogens

(4) None of the above

Allred Rochow's scale is related to:
 

1. Electronegativity, radius, and Z^*

2. Resonance energy of the molecule, ionisation potential and electron affinity.

3. Bond Polarity, diagonal relationship and periodicity.

4. None of the above.