Question

pH plays a very important role in our daily life-most of the biochemical reactions

Answer 1

1. in saving us from tooth decay

2. in saving milk from turning sour ( we add a small amount of NaHCO3 in milk to increase its pH)

3. in determining the acidity or basicity of soil in the fields.

Answer 2

1.pH in our digestive system
2.pH changes leads to tooth decay
3. Self-defence by animals and plants through chemical walfare
3. Nature provides neutralisation option
4. Soil pH and plant growth