NCERT Solutions for Class 10th Science
Chapter 2. Acids, Bases and Salts
Additional Questions With Solutions
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Q1.Write three importance of pH in daily life.
Ans: Importance of pH in daily life.
(i)If pH of our mouth lowers than 5.5 then starts tooth decay.
(ii)Our body works within the range of pH 7.0 to 7.8.
(iii)To find out specific pH range of Soil, in which they grow well.
Q2.Why is Sodium Hydrogen Carbonate a main component of antacid?
Ans: Sodium Hydrogen carbonate is a main component of antacid because it is a basic substance which reacts with stomach’s acid HCl and neutralizes it.
Q3. Why is distilled water not conductor of electric while rain water is a good conductor?
Ans: distilled water is not conductor of electric because there is no H+ ions in it, distilled water is neutral, while rain water’s property is weak acidic. There is no H+ ions which is responsible for carrying the electric current.