SELECT * FROM question_mgmt as q WHERE id=5985 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=11 AND subId=16 AND chapterId=465 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 7th science Acids, Bases and Salts explain why a an antacid tablet is taken whe

Question:

Explain why:

(a) An antacid tablet is taken when you suffer from acidity.

(b) Calamine solution is applied on the skin when an ant bites.
(c) Factory waste is neutralised before disposing it into the water bodies.

Answer:

(a) An antacid tablet is taken during acidity because that time excess amount of acid is produced (HCL) in the stomach. Antacid is an bases that react with excess of acids and neutralize the effect of excessive acid and brings relief. Antacids help to treat heartburn (indigestion). They work by neutralizing the stomach acid that cause heartburn. We can buy many antacids without a prescription.

(b) Calamine solution is applied on the skin when an ant bites because, it injects formic acid into the skin. calamine solution is basic in nature. So, when we applied it on the skin, it neutralize the effect of formic acid. 

(c) Factory waste is neutralized before disposing it into the water bodies because it contains acids. The acidic nature of waste can harm the aquatic animals, so we add some basic chemicals to the waste to neutralize the effects of acid.


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SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=5985 ORDER BY last_viewed_on desc limit 0,10

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