HARD
7th CBSE
IMPORTANT
Earn 100

Are diluted acids weak and concentrated acids strong?

Important Questions on Acids, Bases and Salts

HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Explore

Find out about acid rain. How are sulphuric and nitric acid involved in this?

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 1
Name the chemicals used in manufacturing of H3PO4.
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 1
Name the chemicals used in the manufacturing of NH4NO3.
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 1
Name the chemicals used in the manufacturing of vinegar.
HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 1

Name the chemicals used in the manufacturing of dichloroethane.

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 2
Write the chemical formula of green vitriol and blue vitriol.
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Assess>Q 3
What is aqua-regia?
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>Try This

Find the acidic or basic nature of some substances used in daily life. 

Materials: Substances to examine red and blue litmus papers, dropper. 

Let's do: Place a few red and few blue litmus paper strips on a surface. Put a drop of a solution of substances on each strip and observe the change in colour. 

Observation:

Sr. No. Solution Effect on blue litmus paper  Effect on red litmus paper  Inference
1 Lemon water       
2 Detergent solution      
3 Soap solution       
4 Table salt solution       
5 Hydrochloric acid       
6 Sodium hydroxide       
7 Shampoo       
8 Baking soda solution       
9 Lime water