Question: Name the salt formed when hydrochloric acid reacts with sodium hydroxide solution (a base).Īnswer: When hydrochloric acid reacts with sodium hydroxide solution, then sodium chloride salt is formed.
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Question: Which acid is injected into our body by an ant sting that causes pain?Īnswer: The acid is formic acid which is injected into the skin of a person when an ant bites. Question: Name the reaction when an acid is mixed with base.Īnswer: Neutralization reaction. Acids Bases and Salts – Question: Is lime water an acidic or basic solution?Īnswer: Lime water (calcium hydroxide) is a basic solution. Question: Why does a turmeric stain on white shirt is turned to red when it is washed with soap?Īnswer: Turmeric stain on white shirt is turned to red when it is washed with soap because the soap solution is basic in nature. Question: Name a substance which is used to cure the discomfort caused by indigestion due to over eating.Īnswer: Milk of magnesia which contains magnesium hydroxide (base) is used to neutralize the effect of excessive acid in stomach. Question: Name the acid present in lemon juice and tomato.Īnswer: Citric acid in lemon juice and oxalic acid in tomato. Question: Write the name of two indicators which occur naturally. Question: What name is given to those substances which do not change the colour of either red or blue litmus paper?Īnswer: The solutions or substances which do not change the colour of either red or blue litmus paper are neutral. Question: What is the test for acids and bases using litmus paper?Īnswer: Acids turn blue litmus paper red while bases turn red litmus paper blue.