1.

What is meant by amphoteric oxide ? Give two examples of it and write the equation of its reaction with acid and base.

Answer»

Solution : Metal oxides which react with both acids and bases to FORMS salt and water are called amphoteric oxides. EXAMPLES: (i) Aluminium oxide `(Al_2O_3)`(ii) Zinc oxide(ZnO)
Aluminium oxide REACTS with an acid and a base in the following manner :
`Al_2O_3 + 6HCl to 2AlCl_3 + 3H_2O`
`Al_2O_3 + 2NaOH to underset("sodium ALUMINATE")(2NaAlO_2) + H_2O`
Zinc oxide reacts with an acid and a base in the following manner:
`ZnO + 2HCl to ZnCl_2 +H_2O`
`ZnO + 2NaOH to underset("sodium ZINCATE")(Na_2ZnO_2) + H_2O`


Discussion

No Comment Found

Related InterviewSolutions