Question 21
Acids, Bases and SaltsWhich of the following compounds is a base?
- A.CO2
- B.CaO
- C.H3PO3
- D.CH3COOCH3
Show the answer and explanation
Answer: B (CaO)
Explanation
Calcium oxide is a metal oxide that reacts with acids to form a salt and water, so it is a base. CO2 is acidic, H3PO3 is an acid and CH3COOCH3 is an ester.