Question

In group I of alkali metals, the ionization potential decreases down the group. Therefore lithium is a poor reducing agent in gaseous state.

• A. True
• B. False

Answer 1

The correct option is A True

Alkali metals	Ionization (kJ/mole)
Li	520
Na	496
K	419
Rb	403
Cs	374

In group I of alkali metals, the ionization potential decreases down the group. Therefore lithium is a poor reducing agent in gaseous state. The ionization potential of Li is maximum and the removal of electron from Li requires comparatively higher energy. However in the aqueous solution, Li is extensively hydrated and is the strongest reducing agent.