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
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
Which one of the following is smallest in size ?
N3-
O2-
F -
Na+
The set representing the correct order of ionic radius is
Li+ > Be2+ > Na+ > Mg2+
Na+ > Li+ > Mg2+ > Be2+
Li2+ > Na+ > Mg2+ > Be2+
Mg2+ > Be2+ > Li+ > Na+
The ionic mobility of alkali metal ions in aqueous solution is maximum for
K+
Rb+
Li+
In which of the following pairs does one elements exist as a solid and the other as a liquid under normal conditions ?
I2 and F2
I2 and Br2
Br2 and Hg
Na and Cs
Which element was named as Eka-silicon in Mendeleev's classification of elements ?
Germanium
Gallium
Thallium
Selenium
Which among the following factors is the most important in making fluorine the strongest oxidising agent?
Electron affinity
Ionisation enthalpy
Hydration enthalpy
Bond dissociation energy
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
Which one of the following is correct order of increase of size ?
Mg <Al< Na+ < F -
Na+ < Al < Mg < F -
Na+ < F - < Al < Mg
Na+ < F - < Mg < Al
