Q26 of 270 Page 79

Name the acids or alkalis used to make (i) car batteries (ii) explosives (iii) soaps (iv) fertilizers.

(i) Car batteries- Sulphuric acid is present in car batteries making its ph around 0.8.

(ii) Explosives- The acid-base reaction of ammonia with nitric acid produces ammonium nitrate which is commonly used in explosives.


(iii) Soaps- Washing soda is a chemical substance used in soaps. It is derived from HCl and NaOH.


(iv) Fertilizers- Acid HCl is present in fertilizers which then reacts with water in field to impart H + ions which act as fertilizers.



More from this chapter

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25 A farmer has found that the pH of soil in his fields is 4.2. Name any two chemical materials which he can mix with the soil to adjust its pH. 26 (a) The pH values of six solutions A to F are given below :

A = 0, B = 11, C = 6, D = 3, E = 13, F = 8


Which of the above solutions are


(i) acids


(ii) alkalis?

 27 The pH of a cold drink is 5. What will be its action on blue and red litmus solutions? 27 The pH values of three acids A, B and having equal molar concentrations are 5.0, 2.8 and 3.5 respectively.

Arrange these acids in order of the increasing acid strengths.