ICSE Class 10 Mole Concept and Stoichiometry — Mock Test (2027)
Free online mock test for Mole Concept and Stoichiometry (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 Mole Concept and Stoichiometry 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.Assertion: The vapour density of a gas is always a unitless quantity. Reason: Vapour density is the ratio of the mass of a certain volume of gas to the mass of the same volume of hydrogen under the same conditions of temperature and pressure. (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true, but reason is not the correct explanation of assertion. (c) Assertion is true, but reason is false. (d) Assertion is false, but reason is true.
- A.Both assertion and reason are true and reason is the correct explanation of assertion.
- B.Both assertion and reason are true, but reason is not the correct explanation of assertion.
- C.Assertion is true, but reason is false.
- D.Assertion is false, but reason is true.
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2.Which of the following correctly states Avogadro's law?
- A.Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.
- B.The volume of a gas is inversely proportional to its pressure at constant temperature.
- C.Gases expand to fill their containers regardless of the number of molecules present.
- D.The number of molecules in a gas is proportional to its temperature at constant volume.
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3.20 mL of hydrogen, 10 mL of carbon monoxide, and 20 mL of oxygen are exploded in an eudiometer. What is the volume and composition of the mixture of gases after cooling to room temperature?
- A.15 mL mixture: 5 mL O₂ and 10 mL CO₂
- B.25 mL mixture: 10 mL O₂ and 15 mL CO₂
- C.10 mL mixture: 0 mL O₂ and 10 mL CO₂
- D.30 mL mixture: 5 mL O₂ and 25 mL CO₂
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4.50. (a) Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation: P + 5HNO₃ (conc.) → H₃PO₄ + H₂O + 5NO₂ If 9.3 g of phosphorus was used in the reaction, calculate: (i) Number of moles of phosphorus taken. (ii) The mass of phosphoric acid formed. (iii) The volume of nitrogen dioxide produced at STP. (b) (i) 67.2 litres of hydrogen combines with 44.8 litres of nitrogen to form ammonia under specific conditions as: N₂(g) + 3H₂(g) → 2NH₃(g) Calculate the volume of ammonia produced. What is the
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5.Assertion: $\mathrm{CO}_2$ is indeed $44\ \mathrm{g/mol}$ and molecular weight is defined based on its comparison to 1/12th the mass of Carbon-12. Reason: Both the assertion and the reason are correct, with the reason correctly explaining the assertion. (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true, but reason is not the correct explanation of assertion. (c) Assertion is true, but reason is false. (d) Assertion is false, but reason is true.
- A.Both assertion and reason are true and reason is the correct explanation of assertion.
- B.Both assertion and reason are true, but reason is not the correct explanation of assertion.
- C.Assertion is true, but reason is false.
- D.Assertion is false, but reason is true.
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