ICSE Class 10 Sulphuric Acid (H2SO4) — Mock Test (2027)

Free online mock test for Sulphuric Acid (H2SO4) (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.

Sample questions

1. 1.When concentrated sulphuric acid is added to sugar, a black spongy mass is formed. What causes this reaction?
   • A.Sulphuric acid oxidizes sugar to carbon dioxide.
   • B.Sulphuric acid dehydrates sugar, leaving behind carbon.
   • C.Sulphuric acid reacts with sugar to form a salt.
   • D.Sulphuric acid polymerizes sugar into a black solid.
2. 2.The reaction between concentrated sulphuric acid and magnesium can be represented by the equation: Mg + 2H₂SO₄ → MgSO₄ + 2H₂O + SO₂ If 60 g of magnesium is used in the reaction, calculate: (a) The mass of sulphuric acid needed for the reaction. (b) The volume of sulphur dioxide gas liberated at S.T.P. (Atomic weights: Mg = 24, H = 1, S = 32, O = 16)
3. 3.Which balanced chemical equation correctly shows the action of dilute sulphuric acid on zinc sulphide?
   • A.ZnS + H₂SO₄ → ZnSO₄ + H₂S
   • B.ZnS + H₂SO₄ → ZnO + SO₂ + H₂
   • C.ZnS + 2H₂SO₄ → ZnSO₄ + SO₂ + 2H₂O
   • D.ZnS + H₂SO₄ → Zn + H₂S + SO₃
4. 4.Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v). A. Acid B. Dehydrating agent C. Non-volatile acid D. Oxidising agent (i) C₁₂H₂₂O₁₁ + nH₂SO₄ → 12C + 11H₂O + nH₂SO₄ (ii) S + 2H₂SO₄ → 3SO₂ + 2H₂O (iii) NaCl + H₂SO₄ → NaHSO₄ + HCl (iv) CuO + H₂SO₄ → CuSO₄ + H₂O (v) Na₂CO₃ + H₂SO₄ → Na₂SO₄ + H₂O + CO₂
5. 5.Promoter used in contact process:
   • A.vanadium pentaoxide
   • B.quartz
   • C.potassium oxide
   • D.ferric hydroxide