Ionization potential and electron affinity of fluorine are 17.42 and 3.45 eV respectively. What will be the ratio of electronegativity of fluorine on Mullikan scale and Pauling scale?
2.80 : 1
1.80 : 1
2.40 : 1
4.20 : 1
Which one of the following is correct order of increase of size ?
Mg + < F -
Na+ < Al < Mg < F -
Na+ < F - < Al < Mg
Na+ < F - < Mg < Al
The statement that is not correct for the periodic classification of elements is
the properties of the elements are the periodic function of their atomic number
non-metallic elements are lesser in number than metallic elements
the first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number
for transition elements, the d-subshells are filled with electrons monotonically with increase in atomic numbers
The ionic mobility of alkali metal ions in aqueous solution is maximum for
K+
Rb+
Li+
Na+
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?
Mg2+ < Be2+ < K+ < Ca2+
Be2+ < K+ < Ca2+ < Mg2+
K+ < Ca2+ < Mg2+ < Be2+
Ca2+ < Mg2+ < Be2+ < K+
Which one of the following is smallest in size ?
N3-
O2-
F -
The increasing order of the first ionisation enthalpies of the elements B,P, S and F is
F < S < P < B
P < S < B < F
B < P < S < F
B < S < P < F
Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point?
RbCl
KCl
NaCl
LiCl
In which of the following arrangements, the order is not according to the property indicated against it?
Li < Na < K < Rb : increasing metallic radius
I < Br < F < Cl : increasing electron gain enthalpy (with negative sign)
B < C < N < O : increasing first ionisation enthalpy
Al3+ < Mg2+ < Na+ < F - : increasing ionic size
