Question
Chemistry Question on GROUP 2 ELEMENTS
The correct order of thermal stability of hydroxides is :
A
Ma(OH)2<Sr(OH)2<Ca(OH)2<Mg(OH)2
B
Ba(OH)2<Ca(OH)2<Sr(OH)2<Mg(OH)2
C
Mg(OH)2<Ca(OH)2<Sr(OH)2<Ba(OH)2
D
Mg(OH)2<Sr(OH)2<Ca(OH)2<Ba(OH)2
Answer
Mg(OH)2<Ca(OH)2<Sr(OH)2<Ba(OH)2
Explanation
Solution
The correct order of thermal stability of hydroxide is
Mg(OH)2<Ca(OH)2<Sr(OH)2<Ba(OH)2
On moving down the group, the lattice enthalpy increases and the thermal stability increases.