SSC MCQ Question Ans. Use of Acid, Base and Salt

SSC MCQ Question Ans. Use of Acid, Base, and Salt. SSC MCQ Question Ans. Use of Acid, Base, and Salt. Introduction: You have learnt about acid, base, and salt in class  VIII.  Can you remember their characteristics? In this chapter, we shall discuss different uses of acid, base, and salt.

You have learned about some organic acids in class VIII. You also know that acids produce hydrogen ion (H+) in water. There are some acids, particularly organic acids, which do not dissociate completely in water, i.e. they dissociate partially which means all the acid molecules present do not produce H+ ion. These acids are called weak acids. On the other hand, mineral acids completely dissociate in water to produce H+ i.e. all the acid molecules present undergo dissociation.

SSC MCQ Question Ans. Use of Acid, Base and Salt

Do you know the reason of irritation and swelling when wasps or scorpion sting? It is due to the fact that, when they sting us, a base named histamine is released and this histamine is responsible for irritation and swelling. To treat the sting, the paste used contains vinegar and baking soda which are acids. They react with the base (histamine) and neutralize it; therefore, pain, irritation and swelling reduce.

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