Question

Assertion (A): Lithium reacts with oxygen to form `Li_(2)O`, but potassium reacts with oxygen to form `KO_(2)`.
Reason (R ): Potassium is more reactive than lithium.
A. If both (A) and (R ) are correct and (R ) is the correct explanation of (A).
B. If both (A) and (R ) are correct, but (R ) is not the correct explanation of (A).
C. If (A) is correct, but (R ) is incorrect.
D. If (A) is incorrect, but (R ) is correct.

Answer 1

Correct Answer - B
Correct reason: `Li^(o+)` ion having smaller size forms a stable oxide with small `O^(2-)` ion, whereas large `K^(o+)` ion forms a stable oxide with large `O_(2)^(2-)` ion.