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.(viii) When red lead (Pb₃O₄) is heated with concentrated hydrochloric acid, which of the following reactions correctly represents the products formed?
- A.Pb₃O₄ + 8HCl (conc.) → 3PbCl₂ + Cl₂ + 4H₂O
- B.Pb₃O₄ + 4HCl (conc.) → 3PbO + 2Cl₂ + 2H₂O
- C.Pb₃O₄ + 6HCl (conc.) → 3PbCl₂ + O₂ + 3H₂O
- D.Pb₃O₄ + 2HCl (conc.) → PbCl₂ + PbO₂ + H₂O
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2.Which balanced equation shows the reaction of dilute hydrochloric acid with sodium sulphite?
- A.Na₂SO₃ + 2HCl → 2NaCl + H₂O + SO₂
- B.Na₂SO₃ + HCl → NaCl + H₂SO₄
- C.Na₂SO₃ + 2HCl → Na₂S + 2H₂O + O₂
- D.Na₂SO₃ + HCl → Na₂O + H₂O + SO₂
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3.(vii) Which of the following correctly represents the balanced chemical equation for the reaction between lead nitrate and hydrochloric acid?
- A.Pb(NO₃)₂ + HCl → PbCl₂ + HNO₃
- B.Pb(NO₃)₂ + 2HCl → PbCl₂ + 2HNO₃
- C.Pb(NO₃)₂ + HCl → PbCl + HNO₃ + O₂
- D.Pb(NO₃)₂ + 2HCl → PbCl + 2HNO₃ + Cl
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4.What observation is made when copper sulphide is treated with dilute hydrochloric acid?
- A.A blue solution forms, and oxygen gas is released.
- B.A colourless gas with a rotten egg smell evolves, turning lead acetate solution black.
- C.A yellow precipitate forms, and the solution turns green.
- D.No reaction occurs, and the solution remains colourless.
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5.(a) Aqua regia is a mixture of
- A.Dilute hydrochloric acid and concentrated nitric acid
- B.Concentrated hydrochloric acid and dilute nitric acid
- C.Concentrated hydrochloric acid [1 part] and concentrated nitric acid [3 parts]
- D.Concentrated hydrochloric acid [3 parts] and concentrated nitric acid [1 part]
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