EASY
7th CBSE
IMPORTANT
Earn 100

What is the effect of nitric acid and sodium hydroxide on the turmeric paper indicators?

Important Questions on Acids, Bases and Salts

EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3
What is the effect of nitric acid and sodium hydroxide on the china rose extract indicators?
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3
What is the effect of nitric acid and sodium hydroxide on the phenolphthalein indicators?
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 4
Why is it wrong to treat a bee sting with vinegar?
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 5
Most plants grow the best in neutral conditions. What should be done if the soil becomes basic?
HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 6
State the uses of sodium hydroxide and calcium hydroxide.
HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 1
What will happen if the acidic wastewater from the industries is disposed off into rivers without treating it?
HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 2

A tanker containing sulphuric acid met with an accident and the acid spilled on the road. Moreover, the iron drain covers on that road began melting and fizzing as the acid ran over them. 

A chemist was called to check whether the acid actually leaked into the nearby river or not. 

a) Suggest a method that the chemist must use to check if the river water contained any acid or not. 

b) Name a better term that could be use in the place of 'Melting' in the above report. 

c) What is the reason behind fizzing of iron drain covers when the acid ran over them? 

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3
The pH values of five solutions A, B, C, D and E are given below:
Solution A B C D E
pH 6 8 1 7 14

Which solution is: Neutral?