These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses:
Assertion: `[Al(H_2O)_6]^(3+)` is a stronger acid than `[Mg(H_2O)_6]^(2+)`.
Reason: Size of `[Al(H_2O)_6]^(3+)` is smaller than `[Mg(H_2O)_6]^(2+)` and posseses more effective nuclear charge.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is nto the correct exaplation of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false

Answer

A

Explanation

The size of `[Al(H_(2)O)_(6)]^(3+)`is smaller than `[Mg(H_(2)O)_(6)]^(2+)` Also the former possess more effective nuclear charge effectively. This gives rise to relatively stronger acidic nature of `[Al(H_(2)O)_(6)]^(3+)`.