Question

which one among the following is an acidic . a) Na2o b) Co c) Co2 d) Al203 ​

Answer 1

Answer:

THE ANSWER WOULD BE OPTION

D.AI203

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Answer 2

d) Al203 is an Acidic

Explanation :-

Al2O3 is an amphoteric oxide. This means it can behave both as a base as well as an acid. Now the presence of the other reactant in a reaction actually determines whether Al2O3 will act as an acid or a base.

• For example, when Al2O3 reacts with a strong base or an alkali like NaOH, it acts as an acid and forms its conjugate base [Al(OH)4](-) which forms a salt Na[Al(OH)4] and water just like an acid-base reaction.

Al2O3 + 2NaOH + 3H2O→ 2Na[Al(OH)4]

• And when Al2O3 reacts with a strong acid like HCl solution, it acts as a base forming its conjugate acid [Al(H2O)6](3+) which forms the salt [Al(H2O)6]Cl3 and water like an acid base reaction.

Al2O3 + 6HCl + 9H20 → 2[Al(H2O)6]Cl3

With dry HCl the reaction is,

Al2O3 + 6HCl → 2AlCl3 + 3H2O