Question

(i) Nitya took two test tubes A and B. In test tube A she put 10 mL of dilute NaOH and in test tube B she put 10 mL of dilute HCl. Write the changes observed in both the test tubes on adding a pinch of sodium carbonate and also write the chemical reaction involved. (ii) Define pH scale

Answer 1

Answer:

2. In chemistry, pH is a scale used to specify the acidity or basicity of an aqueous solution. Lower pH values correspond to solutions which are more acidic in nature, while higher values correspond to solutions which are more basic or alkaline. At room temperature, pure water is neutral and therefore has a pH of 7. 

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