The correct sequence which shows decreasing order of the ionic radii of the elements is
Al3+ > Mg2+ > Na+ > F - > O2-
Na+ > Mg2+ > Al3+ > O2- > F -
Na+ > F - > Mg2+ > O2- > Al3+
O2- > F - > Na+ > Mg2+ > Al3+
Ionisation potential and electron affinity of fluorine are 17.42 and 3.45 eV respectively. What will be the ratio of electronegativity of fluorine on Mulliken scale and Pauling scale?
2.80 : 1
1.80 : 1
2.40 : 1
4.20 : 1
The ionic mobility of alkali metal ions in aqueous solution is maximum for
K+
Rb+
Li+
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+
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 one of the following is smallest in size ?
N3-
O2-
F -
Which of the following electronic configurations would exhibit the lowest ionisation energy ?
1s2
1s2,2s2 2p2
1s2,2s2 2p6
1s2,2s2 2p6,3s1
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
An extra electron is added at the periphery of nitrogen atom in the formation of anion. What will be the ratio of effective nuclear charge of nitrogen atom and nitrogen anion?
2.09 : 1
0.09 : 1
3.09 : 1
1.09 : 1
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
