What is the nature of $\text{Al}_2\text{O}_3$?

Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Melting point of Boron (2453 K) is unusually high in group 13 elements.
Reason (R): Solid Boron has a very strong crystalline lattice.
In the light of the above statements, choose the most appropriate answer from the options given below:

Answer 1

Step 1: Idea:
Oxides of metals near the diagonal between metals and non-metals are amphoteric. Aluminium is a good example.

Step 2: Reasoning:
Aluminium oxide dissolves in hydrochloric acid and also in sodium hydroxide, which is the test for amphoteric nature. Neutral oxides such as CO do neither. So the answer is amphoteric.

Final Answer:
$\text{Al}_2\text{O}_3$ is amphoteric, option (C). \[ \boxed{\text{Amphoteric}} \]

What is the nature of \(\text{Al}_2\text{O}_3\)?

Show Hint

The Correct Option is C

Solution and Explanation

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