The Sblock Elements Ques 26
26. Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
[2010]
(a) $\mathrm{CaSO}_4$
(b) $\mathrm{BeSO}_4$
(c) $\mathrm{BaSO}_4$
(d) $\mathrm{SrSO}_4$
Show Answer
Answer:
Correct Answer: 26.(b)
Solution: (b) $\mathrm{Be}^{2+}$ is very small, hence its hydration enthalpy is greater than its lattice enthalpy. Also, hydration energy decreases down the group.
BETA
