MEDIUM
7th CBSE
IMPORTANT
Earn 100

Complete the following table by filling the colour of the indicator in the given solution. 

Substance Blue litmus Red litmus Phenolphthalein Methyl orange
Hydrochloric acid Red      
Sodium hydroxide solution        
Sodium chloride solution        

 

Important Questions on Acids, Bases and Salts

MEDIUM
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 1
How are natural indicators prepared ? Give examples of a flower, root, stem and leaf that can be used as indicator. What are the colour changes observed with red cabbage juice in acidic, basic and neutral medium?
MEDIUM
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 2

Explain the following.

Vinegar is used in packaged food items.

MEDIUM
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 2

Explain the following.

Slaked lime is added to factory waste.

EASY
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 2

Explain the following.

Magnesium hydroxide is used as an antacid.

EASY
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 2
Explain the following:
Strong bases should be handled carefully.
MEDIUM
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 3
What is water of crystallisation? Explain with the help of an example.
EASY
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>LET'S RECALL

Recall and complete the concept map given below.

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EASY
7th CBSE
IMPORTANT
NEW SCIENCE In Everyday Life>Chapter 5 - Acids, Bases and Salts>Exercises>Q 1

Carefully observe the picture and answer the following question.

Identify the food items in the given picture.

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