MEDIUM
7th CBSE
IMPORTANT
Earn 100

You are given two beakers. One has 20 mL of sodium hydroxide, which is a strong base, and the other has 20 mL of ammonium hydroxide, which is a weak base. Both bases have the same concentration. Given an acid and an indicator, how can you tell the strong base from the weak base?

Important Questions on Acids, Bases and Salts

MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Looking Back>Q 1
Acids feel soapy and slippery to the touch.
MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Looking Back>Q 2
Nitric acid is an organic acid while ascorbic acid is a mineral acid.
MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Looking Back>Q 3
Sulphuric acid is used to make fertilisers.
EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Looking Back>Q 4
Bases react with acids to form a salt and water.
MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Looking Back>Q 5
Magnesium hydroxide is a weak acid used to make antacids.
HARD
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Exercises>Q 1
Which of the following are true about acids?
(i) Acids have a sour taste.
(ii) Acids turn red litmus blue.
(iii) Acids turn purple cabbage juice red.
(iv) Acids change the colour of turmeric to red.
MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Exercises>Q 2
Vinegar is _____.
HARD
7th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Acids, Bases and Salts>Exercises>Q 3
Lime juice _____.
(i) turns red litmus to blue
(ii) has no effect on turmeric
(iii) turns purple cabbage juice to green
(iv) turns blue litmus to red