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.What is observed when hydrochloric acid is added to silver nitrate solution?
- A.A white precipitate of silver chloride forms.
- B.The solution turns yellow due to silver ions.
- C.Bubbles of hydrogen gas are released.
- D.No visible reaction occurs.
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2.Why is concentrated nitric acid not used in the preparation of hydrogen chloride gas?
- A.Concentrated nitric acid is volatile and contaminates the hydrogen chloride gas produced.
- B.Concentrated nitric acid reacts explosively with sodium chloride, the common reactant.
- C.Concentrated nitric acid is too weak to produce hydrogen chloride gas efficiently.
- D.Concentrated nitric acid forms a solid precipitate that blocks the apparatus.
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3.Identify the two compounds of Lead that react with concentrated hydrochloric acid to liberate chlorine gas.
- A.Lead monoxide and Lead sulphide
- B.Lead dioxide and Red lead (Pb₃O₄)
- C.Lead acetate and Lead nitrate
- D.Lead carbonate and Lead sulphate
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4.What is the purpose of concentrated hydrochloric acid in the preparation of aqua-regia?
- A.To provide chloride ions and form nitrosyl chloride (NOCl) and chlorine gas, which dissolve noble metals like gold and platinum.
- B.To neutralize the nitric acid and prevent the formation of any harmful gases.
- C.To increase the boiling point of the mixture for faster reaction rates.
- D.To act as a catalyst and speed up the dissolution of metals without participating in the reaction.
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5.Write the balanced chemical equation for the action of dilute hydrochloric acid on sodium sulphide.
- A.Na₂S + HCl → NaCl + H₂S
- B.Na₂S + 2HCl → 2NaCl + H₂S↑
- C.Na₂S + HCl → 2NaCl + S↓
- D.2Na₂S + 2HCl → 4Na + H₂S + S↓
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