(a) Mention the pH range within which our body works. Explain how
antacids give relief from acidity. Write the name of one such antacid.
(b) Fresh milk has a pH of 6. How does the pH will change as it turns to
curd? Explain your answer.
(c) A milkman adds a very small amount of baking soda to fresh milk. Why
ST.BRITTO’S ACADEMY
8
does this milk take a longer time to set as curd?
(d) Mention the nature of toothpastes. How do they prevent tooth decay?
Answers
Answered by
4
During indigestion, stomach produces too much acid which causes pain. Antacids are alkaline and so neutralize the excess acid. 1 Milk of Magnesia is an antacid.
(b) The pH will decrease. The milk when changes to curd becomes more acidic. Lesser the pH value, more is the acidic nature.
(c) So that milk does not get spoilt / sour / change into curd.
(d) Because enzymes which can change milk to curd does not work in alkaline pH.
(e) Tooth pastes are alkaline in nature. They neutralize the excess acid produced by bacteria in mouth.
Similar questions