S Block Elements Question 292
Question: The atomic radii of alkali metals (M) lie in the order $ Li<Na<K<Rb $ but the radii of $ {{M}^{+}} $ ions in aqueous solution lie in the reverse order $ L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}} $ . What is the reason for this reverse order (on going from $ Li $ to $ Rb) $ -
[MP PMT 1997]
Options:
A) Gradual increase in ionisation energy
B) Increasing weakness of the metallic bond
C) Increasing electropositive character
D) Decreasing degree of hydration
Show Answer
Answer:
Correct Answer: D
Solution:
Smaller the atomic size tendency of hydration is more as the size increases tendency for hydration also decreases.
BETA
