ICSE Class 10 Hydrogen Chloride (HCl) — Mock Test (2027)
Free online mock test for Hydrogen Chloride (HCl) (ICSE Class 10 Chemistry) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Hydrogen Chloride (HCl) chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.Which of the following observations correctly distinguishes manganese dioxide from copper (II) oxide when both are treated with concentrated hydrochloric acid?
- A.Manganese dioxide liberates greenish-yellow chlorine gas; copper (II) oxide forms a greenish-blue solution.
- B.Manganese dioxide forms a greenish-blue solution; copper (II) oxide liberates greenish-yellow chlorine gas.
- C.Both compounds liberate hydrogen gas when reacted with concentrated hydrochloric acid.
- D.Manganese dioxide forms a black precipitate; copper (II) oxide remains unchanged.
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2.What observation is made when hydrochloric acid is added to silver nitrate solution?
- A.A white precipitate of silver chloride is obtained.
- B.A yellow precipitate of silver chloride is formed.
- C.The solution turns blue due to silver ions.
- D.No visible change occurs in the solution.
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3.Some word/words are missing in the following statement. Select the correct form: Aqua regia contains one part by volume of nitric acid and three parts by volume of hydrochloric acid.
- A.Aqua regia contains one part by volume of dilute nitric acid and three parts by volume of dilute hydrochloric acid.
- B.Aqua regia contains one part by volume of concentrated nitric acid and three parts by volume of concentrated hydrochloric acid.
- C.Aqua regia contains one part by volume of nitric acid and three parts by volume of concentrated hydrochloric acid.
- D.Aqua regia contains one part by volume of concentrated nitric acid and three parts by volume of dilute hydrochloric acid.
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4.Hydrogen chloride gas is collected by ______________ of air as it is ______________ than air.
- A.downward displacement, lighter
- B.upward displacement, heavier
- C.downward displacement, heavier
- D.upward displacement, lighter
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5.Why is hydrogen chloride gas collected by upward displacement of air?
- A.It is lighter than air and rises to displace it downward.
- B.It is highly soluble in water and cannot be collected over it.
- C.It is approximately 1.28 times heavier than air, allowing it to displace air upward.
- D.It reacts with air to form a denser compound, forcing air out.
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