ICSE Class 10 Some Basic Concepts of Chemistry — Mock Test (2027)
Free online mock test for Some Basic Concepts of Chemistry (ICSE Class 10 Chemistry) — 104 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 Some Basic Concepts of Chemistry 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.The present system of atomic masses, agreed upon in 1961, takes as its standard:
- A.Carbon-12 assigned a mass of exactly 12 amu
- B.Hydrogen assigned a mass of exactly 1 amu
- C.Oxygen-16 assigned a mass of exactly 16 amu
- D.Carbon-12 assigned a mass of exactly 1 amu
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2.For CaCO3(s) + 2HCl(aq) -> CaCl2(aq) + CO2(g) + H2O(l), what mass of CaCO3 (molar mass = 100 g/mol) is required to react completely with 25 mL of 0.75 M HCl?
- A.0.9375 g
- B.1.875 g
- C.0.469 g
- D.1.25 g
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3.Avogadro's Law (1811) states that equal volumes of all gases at the same temperature and pressure contain:
- A.Equal number of molecules
- B.Equal masses
- C.Equal number of atoms only
- D.Equal densities
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4.Which of the following statements about chemical and physical properties is NOT correct?
- A.Physical properties can be measured or observed without changing the composition of the substance
- B.Measurement of a chemical property requires a chemical change to occur
- C.Colour, melting point and density are examples of physical properties
- D.Combustibility and reactivity with acids are physical properties
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5.Calculate the molarity of a solution prepared by dissolving 4 g of NaOH (molar mass = 40 g/mol) in enough water to make 250 mL of solution.
- A.0.2 M
- B.0.4 M
- C.1.0 M
- D.0.1 M
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