In the following sets of reactants which two sets best exhibit the amphoteric character of

Question:

In the following sets of reactants which two sets best exhibit the amphoteric character of $\mathrm{Al}_{2} \mathrm{O}_{3} \cdot \mathrm{xH}_{2} \mathrm{O}$ ?

  1. 1 and 2

  2. 2 and 4 

  3. 1 and 3

  4. 3 and 4

Correct Option: , 3

Solution:

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