Question

In the thermite process, an amphoteric oxide is formed. What would we get if ethanol is passed over heated powder of this amphoteric oxide.​

Answer 1

Answer:

Thermite is a pyrotechnic composition of metal powder, fuel and metal oxide. When ignited by heat, thermite undergoes an exothermic reduction-oxidation reaction. Aluminium is used in thermite process because of its high boiling point and low cost. When heated with oxygen, it gives aluminium oxide, which is an amphoteric substance, meaning it can react with both acids and bases. Thus, A is aluminium and B is aluminium oxide.

Reaction of aluminium oxide with hydrochloric acid can be written as follows:

Al

2

O

3

+6HCl→2AlCl

3

+3H

2

O

Reaction of aluminium oxide with sodium hydroxide can be written as follows:

Al

2

O

3

+2NaOH→2NaAlO

2

+H

2

O