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.A mixture of hydrogen and chlorine occupying 36 cm³ was exploded. On shaking it with water, 4 cm³ of hydrogen was left behind. What was the composition of the original mixture?
- A.16 cm³ hydrogen and 20 cm³ chlorine
- B.20 cm³ hydrogen and 16 cm³ chlorine
- C.18 cm³ hydrogen and 18 cm³ chlorine
- D.32 cm³ hydrogen and 4 cm³ chlorine
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2.The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9% phosphorus and 39% oxygen. Which of the following is the empirical formula of the compound?
- A.NaPO₄
- B.Na₂PO₃
- C.Na₃PO₄
- D.Na₃P₂O₅
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3.0.5 gram of an organic compound contains 0.062 g of hydrogen and 0.25 g of oxygen. In the vapour state this compound weighs 32 times as heavy as the same volume of hydrogen. Determine the molecular formula of the compound.
- A.C₂H₄O
- B.C₂H₈O₂
- C.CH₄O
- D.C₄H₈O₄
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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.Calculate the percentage of Sodium in Sodium aluminium fluoride (Na₃AlF₆) correct to the nearest whole number (F = 19, Na = 23, Al = 27).
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