ICSE Class 10 Organic Chemistry — Mock Test (2027)
Free online mock test for Organic Chemistry (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 Organic 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.How is ethene prepared by a dehydration reaction? The correct method and products are:
- A.By heating ethanol with concentrated sulphuric acid at 170°C to form ethene and water.
- B.By reacting ethane with chlorine in the presence of sunlight to form ethene and hydrogen chloride.
- C.By heating ethanol with dilute sulphuric acid at 100°C to form ethene and hydrogen.
- D.By passing ethanol vapor over heated alumina at 350°C to form ethane and water.
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2.Describe the process of adding hydrogen to ethyne (catalytic hydrogenation) in the presence of nickel, including the two stages of the reaction. Which of the following correctly represents the stages?
- A.First stage: C₂H₂ + H₂ → C₂H₄ (Ethene); Second stage: C₂H₄ + H₂ → C₂H₆ (Ethane), both with Ni catalyst.
- B.First stage: C₂H₂ + H₂ → C₂H₆ (Ethane) directly, with Ni catalyst.
- C.First stage: C₂H₂ + H₂ → C₂H₄ (Ethene); Second stage: C₂H₄ + H₂ → C₃H₈ (Propane), with Ni catalyst.
- D.First stage: C₂H₂ + H₂ → C₂H₄ (Ethene) without catalyst; Second stage: C₂H₄ + H₂ → C₂H₆ (Ethane) with Ni catalyst.
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3.Write the IUPAC name of the following compound: ``` CHO | CH2 - CH2 - CH2 - CHO ```
- A.Pentanal
- B.Pentan-1,5-dial
- C.1,5-Pentanedione
- D.Butane-1,4-dial
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4.The molecules of the alkene family are represented by the general formula CₙH₂ₙ. What do the symbols n and 2n signify in this formula?
- A.n signifies the number of carbon atoms, and 2n signifies the number of hydrogen atoms.
- B.n signifies the number of hydrogen atoms, and 2n signifies the number of carbon atoms.
- C.n signifies the total number of atoms, and 2n signifies the number of carbon atoms.
- D.n signifies the number of double bonds, and 2n signifies the number of hydrogen atoms.
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5.What is the general formula for alkanoic acids?
- A.CₙH₂ₙ₊₂COOH (where n = number of carbon atoms)
- B.CₙH₂ₙCOOH (where n = number of carbon atoms)
- C.CₙH₂ₙ₊₁CHO (where n = number of carbon atoms)
- D.CₙH₂ₙ₊₁OH (where n = number of carbon atoms)
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