EASY
7th CBSE
IMPORTANT
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The substance which shows the nature of a solution as acidic or basic with the change in colour is called an indicator.

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Important Questions on Acids, Bases and Salts

MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VI
Most of the organic acids come from plants. 
HARD
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VI
Alkali is a base which is not soluble in water. 
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VI
Red litmus turns blue in a solution containing vitamin 'C'.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VI
Vinegar is basic in nature. 
HARD
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VII

Match the term A with the statement B in the following:

Column A Column B
1. Slaked lime (i)used in batteries
2. pH 8 (ii)sour in taste
3. Vinegar (iii)apply on bee's sting
4. Sulphuric acid (iv)indicator, turns brown with the application of soap
5. Yellow from turmeric (v)basic in nature

 

MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VIII
Which one of these is a very weak acid? 
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VIII
Neutralization reaction takes place between: 
HARD
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 5 - Acids, Bases and Salts>EXERCISES>Q VIII
A dilute solution of sodium carbonate turns: