Acids, Bases, and Salts CDS Questions

CDS Chemistry

Acids, Bases, and Salts MCQ Questions


7.
Which of the following is classified as a weak acid?
A.
Sulphuric acid (H2SO4)
B.
Acetic acid (CH3COOH)
C.
Nitric acid (HNO3)
D.
Hydrochloric acid (HCl)
😑 View Answer Rough Work Error
ANSWER :
B. Acetic acid (CH3COOH)
8.
A strong base is best described as one that:
A.
Has an extremely high melting point
B.
Is completely insoluble in water
C.
Always exists as a solid at room temperature
D.
Ionises almost completely in aqueous solution
😑 View Answer Rough Work Error
ANSWER :
D. Ionises almost completely in aqueous solution
9.
'Glacial acetic acid' refers to:
A.
Pure (water-free) acetic acid, which can solidify into ice-like flakes in cold climate
B.
A mixture of acetic acid and glycerol
C.
A very dilute solution of acetic acid used in glaciers
D.
Hydrochloric acid that has been frozen for storage
😑 View Answer Rough Work Error
ANSWER :
A. Pure (water-free) acetic acid, which can solidify into ice-like flakes in cold climate
10.
While preparing a dilute acid solution from a concentrated acid, the correct and safe procedure is to:
A.
Heat the concentrated acid first, then add water
B.
Add the concentrated acid slowly to water, with constant stirring
C.
Mix equal volumes of acid and water rapidly in one go
D.
Add water slowly to the concentrated acid, with constant stirring
😑 View Answer Rough Work Error
ANSWER :
B. Add the concentrated acid slowly to water, with constant stirring
11.
Which natural substance remains yellow in an acidic medium but turns reddish-brown when it comes in contact with a basic (alkaline) substance?
A.
Phenolphthalein
B.
Litmus
C.
Turmeric
D.
Methyl orange
😑 View Answer Rough Work Error
ANSWER :
C. Turmeric
12.
The synthetic indicator phenolphthalein is:
A.
Colourless in both acidic and basic solutions
B.
Pink in an acidic solution and colourless in a basic solution
C.
Colourless in an acidic solution and pink in a basic solution
D.
Yellow in an acidic solution and pink in a basic solution
😑 View Answer Rough Work Error
ANSWER :
C. Colourless in an acidic solution and pink in a basic solution