Effective nuclear charge (Z*) can be calculated using the formula
Z* = Z-S
Z* = Z + S
Z* = S – Z
Z = Z* – S
The bond length of Cl2 molecule is
0.74
1.44
1.98
2.28
Pick the correct statement
Carbon having more nuclear charge than boron
The size of carbon atom is larger than boron
Carbon forms electron deficient compounds
Carbon forms ionic compounds
Noble gases have _____electron affinity.
High
Low
Zero
Very low
The scale which is based on an empirical relation between the energy of a bond and the electro negativities of bonded atoms is
Pauling scale
Mulliken’s scale
Sanderson’s scale
Alfred and Rochow’s scale
When XA>>XB, A–B bond is
Covalent
Non-polar covalent
Ionic
Metallic
Ionization energy is
directly proportional to size of atom
directly proportional to nuclear charge
increase with less stable electronic configuration
none of these
Electronegativity of an atom is
Directly proportional to its nuclear charge
directly proportional to its atomic radii
inversely proportional to its nuclear charge
independent
Among the following which has the maximum ionisation energy
Alkali elements
Alkaline elements
Halogens
Noble gases
Electron affinity is expressed in
kJ
J
kJ mol
kJ mol-1
