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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?

AIt decreased

BIt rose up

CIt first increased and then decreased

DIt remained constant

Answer:

A. It decreased

Read Explanation:

  • 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.


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