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WorksheetsCH 5 ACIDS BASES AND SALTS CLASS 7 NCERT
Total questions: 10
Worksheet time: 5mins
Out of these gases which one is used in fire extinguishers
CO2
O
N
Argon
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:
Red and blue
blue and orange
colourless and pink
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
Organic matter
Quick lime
Slaked lime
Calamine solution
Which of the following is an acid-base indicator?
Vinegar
Baking Soda
Turmeric
Salt
A solution of ammonium chloride turns blue litmus ………………..
red
brown
blue
yellow
Ammonium chloride is an example of ………………..
base
acidic salf/acid
neutral
salt
Corrosion is a ……………….. process.
slow
fast
medium
……………….. is used for manufacturing washing soda and baking soda.
Sodium chloride
Ammonium hydroxide
Which is called king of acids ?
Sulphuric acid
Nitric acid
Hydrochloric acid
Sodium chloride
Sulphuric acid is a mineral acid ?
True
False
