Read the situation give below and select answer to the questions:
Situation 1: Anjana left a glass of milk on the table overnight even after her mother instructed her to place it in the fridge. The next morning, when she noticed it smelled sour. Her mother said that it had curdled.
1. Why does a milkman add a small amount of baking soda to the milk can?
Situation 2: A farmer observed that his crops are not growing well. So he grabbed some soil from his land and decided to test the nature of the soil. He found that the pH of the soil is 5.7.
2. What does the farmer should add to the soil to make it fertile?