The solubilities of carbonates decrease down the magnesium group due to a decrease in
lattice energies of solids
hydration energies of cations
inter-ionic attraction
entropy of solution formation
B.
hydration energies of cations
Solubilities of carbonates decreases down the group because lattice energy decrease is almost constant while decrease in hydration energy downs sharply, finally difference of hydration energy and lattice energy decrease thus solubility decreases.
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+
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