Acids, Bases and Salts NDA Questions

NDA Chemistry

Acids, Bases and Salts MCQ Questions


13.
What is our tooth enamel made up of?
A.
Phenolphthalein
B.
Ammonia
C.
Calcium phosphate
D.
Calcium oxide
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ANSWER :
C. Calcium phosphate
14.
Which of the following acid can be found in eye washes?
A.
Boric acid
B.
Oxalic acid
C.
Lactic acid
D.
Formic acid
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ANSWER :
A. Boric acid
15.
When an acidic solution contains more number of weakly-bonded hydrogen atoms, then the acid is said to be _____
A.
Base
B.
Weak
C.
Strong
D.
Neutral
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ANSWER :
C. Strong
16.
What is the chemical name of chuna?
A.
Sodium chloride
B.
Calcium oxide
C.
Sodium hydrogen carbonate
D.
Phenolphthalein solution
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ANSWER :
B. Calcium oxide
17.
Ant bite effect can be neutralised by rubbing _____
A.
Calamine solution
B.
Moist baking soda
C.
Vinegar
D.
Both a and b
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ANSWER :
D. Both a and b
18.
Common salt is _____
A.
Acidic
B.
Basic
C.
Insoluble
D.
Neutral
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ANSWER :
D. Neutral