Q4 of 34 Page 34

Which one of the following types medicines is used for treating indigestion?

Antacids are a group of mild bases that have no toxic effects on the body. Being basic in nature, antacid reacts with excess of acid in the stomach and neutralizes it. This gives relief to the person concerned.

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2

A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

 3

10 ml of a solution of NaOH is found to be completely neutralised by 8 ml of a given solution of HCI. If we take 20 ml of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be:

 5

Write word equations and then balanced equations for the reactions taking place when:

(a) dilute sulphuric acid reacts with zinc granules


(b) dilute hydrochloric acid reacts with magnesium ribbon


(c) dilute sulphuric acid reacts with aluminium powder


(d) dilute hydrochloric acid-reacts with iron filings

 6

Compounds such as alcohol and glucose also contain hydrogen but are not categorized as acids. Why? Describe an activity to prove it.