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7th Jammu and Kashmir Board
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The substances which show different colours in acids and bases are called indicators.

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Important Questions on Acids, Bases and Salts

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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q (III)
Milk of magnesia and slaked lime are examples of neutral substances.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q (III)
Acid rain is caused by the excess of carbon dioxide in air.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q (III)
Potassium hydroxide turns blue litmus red.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q (III)
Most of the fruits contain organic acids.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q 1
Name three organic and three inorganic acids.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q 2
What are indicators? Name any three indicators and state the colour change which takes place in (i) acids and (ii) bases.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q 3
What are neutral substances? Give examples of two neutral substances.
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7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q 4
You are given three unlabelled bottles A, B and C containing colourless solutions, such that one of them is acid, the other being basic and neutral. How will you distinguish between them by using china rose as an indicator?