MEDIUM
7th Telangana Board
IMPORTANT
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Turmeric stains on white clothes, when washed with soap, turn red. Why?

Important Questions on Acids - Bases

EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 7
Ammonia is present in window cleaners. It turns red litmus blue. What is its nature?
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 8
What is the nature of urea? Is it acidic, basic/neutral? How can we verify it?
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 9
Red litmus paper is dipped in a solution. Ir remains red. What is the nature of the solution? Explain your answer?
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 10
What is the effect of basic substances on turmeric powder?
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 11
Can flowers and turmeric papers also be called indicators? Why?
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 12
Indicators show different colours in acidic and basic solutions.
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 12
Sodium hydroxide turns blue litmus red.
EASY
7th Telangana Board
IMPORTANT
Science Class - 7>Chapter 2 - Acids - Bases>Improve your learning>Q 12
Tooth decay is caused by the presence of a base.