Question

The Table shows pH values of solutions of compounds D, E. F and G

Compound	D	E	F	G
pH value of solution	2	5	7	13

1. State which one of the compounds is likely to be:
   1. sodium chloride: 
   2. ammonium nitrate.
2. Select two compounds that can be used to illustrate the amphoteric nature of an oxide. 
3. Give a reason for the answer in (2)

Answer 1

1.  
   1. F or pH7
   2. E or pH5
2. D and G or 2 and 13 
3. Amphoteric oxides react with both strong acids/acids and alkalines
   OR
   Amphoteric oxides behave as acids or bases.