MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Earn 100

What is the nature of urea? Is it acidic, basic or neutral? How can we verify it?

Important Questions on Acids and Bases

MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 9
Red litmus is dipped in a solution. It remains red. What is the nature of the solution? Explain your answer. 
MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 10
What is the effect of basic substances on turmeric paper?
MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 11
Can flowers and turmeric papers also be called as indicators? Why?
MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 12
Indicators show different colours in acidic and basic solutions.
MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 12

Correct the statement if it is wrong:

Sodium hydroxide turns blue litmus red.

MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 12

Correct the statement if it is wrong:

Tooth decay is caused due to the presence of base.

HARD
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 14
Visit a doctor. Find out the medicines she prescribes to treat acidity. Ask her how acidity can be naturally prevented. Prepare a report.
MEDIUM
7th Andhra Pradesh Board
IMPORTANT
Science Class VII>Chapter 2 - Acids and Bases>Improve your learning:>Q 15
Prepare red cabbage juice by boiling a piece of red cabbage in water. Use it as an indicator and test acidic and basic solutions with it. Present your observation in the form of table.