In which of the reactions represented by the following equations is HNO3 behaving as a typical acid?
-
CaO + 2HNO3 → Ca(NO3) 2 + H 2O
- Cu + 4HNO3 → Cu(NO 3)2 + 2H2O + 2NO2
- S + 6HNO3 → H2SO 4 + 6NO2 + 2H2O
- P + 5HNO3 → H 3PO 4 + 5NO2 + H2O
The correct answer is: A
Explanation
When an acid (HNO3) reacts with a base(CaO), the products are usually salts( Ca(NO3)2 and water(H2O). Hence, HNO3 behaved like a typical acid in Option A.