S Block Elements Question 5
Question: The solubility in water of sulphates down the $ Be $ group is $ Be>Mg»Ca>Sr>Ba $ . This is due to
[CBSE PMT 1995]
Options:
A) High heat of solvation for smaller ions like $ B{{e}^{2+}} $
B) Increasing molecular weight
C) Decreasing lattice energy
D) Increase in melting points
Show Answer
Answer:
Correct Answer: A
Solution:
The hydration energy decreases from $ B{{e}^{+2}} $ to $ B{{a}^{+2}} $ . This causes the decrease in the solubilities of the sulphates in this order. In other words, the solubilities decreases with increase in the ionic size.
BETA
