Single Choice

In the following sets of reactants which two sets exhibit the amphoteric character of $$Al_2O_3.xH_2O$$? Set 1 : $$Al_2O_3.xH_2O$$ (s) and $$OH^-(aq)$$ Set 2 : $$Al_2O_3.xH_2O$$ (s) and $$H_2O (l)$$ Set 3 : $$Al_2O_3.xH_2O$$ (s) and $$H^+ (aq)$$ Set 4 : $$Al_2O_3.xH_2O$$ (s) and $$NH_3 (aq)$$

A1 and 2
B1 and 3
Correct Answer
C2 and 4
D3 and 4

Solution

$$Al_2O_3.xH_2O$$ (s) with $$H^+$$ or $$OH^-$$ exhibit the amphoteric nature. Aluminium oxide is amphoteric oxide because it shows the properties of both acidic and basic oxides. It reacts with both acids and bases to form salt and water.

$$Al_2O_3⋅xH_2O+2NaOH⟶NaAlO_2+H_2O$$

$$Al_2O_3⋅xH_2O+HCl⟶AlCl_3+H_2O$$

Hence, option B is correct.

SIMILAR QUESTIONS

p - block Elements

Which of the following is an amphoteric oxide?

p - block Elements

Which one of the following is an amphoteric oxide?

p - block Elements

Which of the following oxides reacts with Both $$HCl$$ and $$NaOH$$ ?

p - block Elements

Which of the following oxide is amphoteric?

p - block Elements

The option(s) with only amphoteric oxides is (are):

p - block Elements

What are amphoteric oxides? Give two examples of amphoteric oxides.

p - block Elements

Which of the following sets of oxides is amphoteric in nature?

p - block Elements

Which of the following is not an amphoteric ion?

p - block Elements

Which of the following is amphoteric oxide? $$Mn_2O_7, \, CrO_3, \, Cr_2O_3, \, CrO, \, V_2O_5, \, V_2O_4$$

p - block Elements

Select the amphoteric substance in the following :

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