HARD
7th CBSE
IMPORTANT
Earn 100

Shaurya is provided with three kinds of liquid. One is sodium hydroxide; another is hydrochloric acid and third is a sugar solution. How will he identify them when he has only blue litmus?

Important Questions on Acids, Bases and Salts

HARD
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>ASSESSMENT ZONE>Q F
What will happen if the acidic industrial waste waters are dumped into rivers without treating them?
HARD
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>ASSESSMENT ZONE>Q F
Take water in a test tube and add a few drops of blue litmus to it. With the help of a straw, blow air into the solution. It turns red. Explain the reason of colour change.
HARD
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>ASSESSMENT ZONE>Q F
Why are acidic food not good for your teeth? How can you prevent it?
HARD
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 6 - Acids, Bases and Salts>ASSESSMENT ZONE>Q F
Phenolphthalein when added to a liquid X did not show any colour change. Mention 2 inferences drawn from this activity.