Question

In the given reaction, Al2O3 + NaOH   →  ……X……   +  H2O

What is element X?

a) NaAlO2

b) Na3Al

c) Na2O3

d) NaAl2O3

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Answer 1

Answer: (a) NaAlO2

Explanation: Aluminium oxide is amphoteric in nature, i.e., it reacts with acids as well as bases to form salt and water.

Here, aluminium oxide behaves as an acid as it reacts with NaOH, a base and forms sodium aluminate (NaAlO2) and water:

Al2O3 + NaOH → 2NaAlO2+ H2O

hope it's helps you

Answer 2

Answer: (a) NaAlO2

Explanation: Aluminium oxide is amphoteric in nature, i.e., it reacts with acids as well as bases to form salt and water.

Here, aluminium oxide behaves as an acid as it reacts with NaOH, a base and forms sodium aluminate (NaAlO2) and water:

Al2O3 + NaOH → 2NaAlO2+ H2O

hope it's helps you