HARD
7th CBSE
IMPORTANT
Earn 100

You have been provided with three test-tubes. One of these test-tubes contains distilled water and the other two contain an acidic and a basic solution respectively. If you are given only blue litmus paper, how will you identify the contents of each test-tube? 

Important Questions on Acids, Bases and Salts

EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 1
Name one natural indicator and one synthetic indicator.
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 2
Name the acid-base indicator extracted from lichens. (Turmeric/ Litmus/ Onion)
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 3
What colour do the litmus solution indicator turn when added to an acid?
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 3
What colour does the china rose indicator turn when added to an acid? (Deep pink / Deep yellow)
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 4
What colour do the litmus Solution indicator turn when added to base?
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 4
What colour do the china rose indicator turn when added to base?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 4
What colour does the phenolphthalein indicator turn when added to the base?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 5 - Acids, Bases and Salts>Very Short Answer Type Questions>Q 4
What colour does the turmeric paper indicator turn when added to the base?