WorksheetsGR-7 Acid, Bases and Salts
Total questions: 10
Worksheet time: 3mins
A base used in baking bread is:
NaHCO3
CaCO3
NH4OH
None of the above
Choose the incorrect statement about acid.
(i) Acids have a sour taste.(ii) Acids turn blue litmus red.(iii) Acids have a soapy feel.(iv) Acids are non-corrosive in nature.
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
A student understands that litmus solution has purple colour in distilled water. What colour is
likely to be observed when it is placed in an acidic solution?
Blue
Green
Red
Purple
Which of these mixtures represents a neutralization reaction?
Acid +Acid
Acid +Base
Acid + Water
Base +Water
A base contained in calamine solution which neutralises the acidic liquid of the ant is:
Mg(OH)2
ZnCO3
HNO3
NaHCO3
When Vedika washed a stain of vegetable curry on her suit with a cloth washing bar then it turned brownish-red, then it shows that the:
Stain was of turmeric and the cloth washing bar was acidic.
Stain was of ice-cream and the cloth washing bar was acidic.
Stain was of turmeric and the cloth washing bar was basic.
Stain was of yellow paint and the cloth washing bar was acidic.
Which of the following is a neutral substance?
Distilled water
Common salt
Sugar
All the above
Sodium Chloride will turn:
Turmeric brownish-red
China rose green
Litmus blue to red
None of these
Properties of an acid is due to the presence of:
Ammonium ions
Oxide ions
Hydrogen ions
Hydride ions
Acid rain is caused due to the excess of:
Carbon dioxide
Sulphur dioxide
Nitrogen dioxide
All the above
