The correct order of ionisation energy of C, N, O and F is
C < N < O < F
C < O < N < F
F < O < N < C
F < N < C < O
Pauling's electronegativity values for elements are useful in predicting :
polarity of bonds in molecules
position of elements in electromotive series
co-ordination number
dipole moment of various molecules
Which is the correct order of electronegativity?
F > N < O < C
F > N > O > C
F > N > O < C
F < N < O = C
Which of the following pairs involves isoelectronic ions ?
Mn3+ and Fe2+
Mn2+ and Fe3+
Cr3+ and Mn2+
Fe2+ and Co2+
A metallic oxide reacts with water to from its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be
CaO
KO2
Li2O
Na2O2