Question

Babu took some quantity of dilute nitric acid in a test tube and heated the test tube at 70°C for about 10 minutes. What was its effect on the pH of nitric acid?

• A. It decreased
• B. It rose up
• C. It first increased and then decreased
• D. It remained constant

Answer 1

Answer:

A. It decreased

• Heating dilute nitric acid at 70°C for about 10 minutes will likely cause a slight decrease in its pH due to the increased ionization of nitric acid and the effects of its decomposition products.

• It's important to note that the change in pH might not be very significant for a dilute solution and a relatively short heating time at this temperature, as nitric acid is already strongly acidic.