(i) Name one antacid. How does it help to relieve indigestion in the stomach?
(ii) A farmer treats the soil with quicklime or calcium carbonate. What is the nature of soil? Why does the farmer treat the soil with quicklime?
(i) Name of an antacid is Magnesium hydroxide (Milk of magnesia).
During indigestion, our stomach produces too much acid and this irritates us. Hence, when we take a base, like milk of magnesia, it neutralises the effect of the excess acid and relieves us from irritation and indigestion.
(ii) Quicklime or calcium carbonate is basic in nature. Hence, the nature of the soil must be acidic. Plants grow well in the pH range of 6-8. So, when the soil becomes acidic in nature the farmers add bases like quicklime or calcium carbonate to neutralise the excess acid and maintain the pH of the soil.