NEETChemistrys Block Elements
What is the trend in hydration enthalpy of alkali metal ions as you move down the group?
Options
- AIncreases
- BDecreases
- CRemains constant
- DFluctuates unpredictably
Correct answer
B. Decreases
Step-by-step solution
The trend in hydration enthalpy of alkali metal ions is that it decreases as you move down the group. This is because larger ions have a lower charge density and are less effective at attracting and binding water molecules.