NCERT Class VII Science Solutions: Chapter 5-Acids, Bases and Salts Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 1:

State differences between acids and bases.

Answer:

Difference between Acids and Bases
S. NoAcidsBases
1.Its taste is sour.Its taste is bitter.
2.When added to litmus solution, it turns red.When added to litmus solution, it turns blue.
3.Examples: Curd, lemon juice and vinegar.Examples: Baking soda, Soap and lime water.
Diagram Shows Differences between Acids and Bases

Question 2:

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Answer:

Bases turn red litmus blue, so nature of ammonia is basic.

As Showing in Images is a Ammonia

Question 3:

Name the source from which litmus solution is obtained. What is the use of this solution?

Answer:

Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. So, it is used to test the acidic or basic nature of solutions.

As Showing in Images is a Result for Litmus Solution is Obt …