Everyday Science · Everyday & Industrial Chemistry · page 3 of 8

Acids Used in Everyday Life MCQs with Answers

Includes 7 past paper MCQs (marked).

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Acids Used in Everyday Life MCQs (21–30)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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21.
The empirical formula of Hydrochloric acid is ?
Correct Answer: A. HCl
One-liner
The empirical formula of Hydrochloric acid is HCl.
22.
Which substance is known as Oil of Vitriol?
Correct Answer: B. Sulfuric acid
One-liner
Oil of Vitriol is the historical/common name for Sulfuric acid (H₂SO₄).
23.
Past Paper MCQ
From which organism is formic acid obtained?
Correct Answer: C. Ant
One-liner
Formic acid is obtained from ants, and its name is derived from the Latin word *formica* meaning ant.
24.
Formic acid is obtained from ?
Correct Answer: B. Red ants
One-liner
Formic acid is obtained from red ants.
25.
Strongest acid among the following is _?
Correct Answer: C. CF₃COOH
One-liner
The strongest acid among the given options is CF₃COOH (trifluoroacetic acid) because fluorine's high electronegativity withdraws electrons most effectively, stabilizing the conjugate base.
26.
The pH of 0.1M pyruvic acid will be _?
Correct Answer: B. 4.5
One-liner
The pH of 0.1M pyruvic acid is 4.5, as it is a weak organic acid with a pKa around 2.5, and for a weak acid, pH = ½(pKa – log C).
27.
Which one of the following is a strong acid?
Correct Answer: A. HI (Hydroiodic acid)
One-liner
HI (Hydroiodic acid) is a strong acid because it completely dissociates into H⁺ and I⁻ ions in aqueous solution.
28.
The pH of hydrochloric acid is _?
Correct Answer: A. Less than 7
One-liner
The pH of hydrochloric acid is less than 7 because it is a strong acid.
29.
What is the chemical name of Vinegar?
Correct Answer: A. Dilute Acetic Acid
One-liner
The chemical name of vinegar is Dilute Acetic Acid.
30.
Which acid is strong enough that a single drop can cause severe skin damage?
Correct Answer: B. Sulphuric acid
One-liner
Sulphuric acid is a highly corrosive strong acid that can cause severe skin burns even from a single drop.

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Acids Used in Everyday Life MCQs with Answers

Acids Used in Everyday Life MCQs (21–30)

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