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.Assertion: Methane is a saturated hydrocarbon. Reason: Methane contains a carbon-carbon double bond. (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.In the given diagram showing the substitution reaction of methane with chlorine, which labelled part represents the product formed when three hydrogen atoms in methane have been replaced by chlorine atoms?
- A.Chloromethane (CH₃Cl)
- B.Dichloromethane (CH₂Cl₂)
- C.Trichloromethane (CHCl₃)
- D.Tetrachloromethane (CCl₄)
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3.Select the correct answer from the choice in brackets: The vapour density of the fifth member of the homologous series of alkanes. [22/36/29]
- A.22
- B.36
- C.29
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4.What is the effect of ethanol on the human body?
- A.Ethanol acts as a stimulant, increasing alertness and energy levels.
- B.Ethanol acts as a depressant, impairing judgment, coordination, and reflexes, and can cause unconsciousness or respiratory failure in high doses.
- C.Ethanol has no significant effect on the central nervous system but strengthens the immune system.
- D.Ethanol primarily affects the digestive system, causing immediate nausea and vomiting.
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5.Which set correctly gives the IUPAC names and condensed formulas for the first four alcohols?
- A.Methanol: CH₃OH, Ethanol: CH₃–CH₂OH, Propanol: CH₃–CH₂–CH₂OH, Butanol: CH₃–CH₂–CH₂–CH₂OH
- B.Methane: CH₄, Ethane: C₂H₆, Propane: C₃H₈, Butane: C₄H₁₀
- C.Methanol: CH₄O, Ethanol: C₂H₅OH, Propanol: C₃H₇OH, Butanol: C₄H₉OH (incorrect naming)
- D.Methanal: CH₂O, Ethanal: CH₃CHO, Propanal: C₂H₅CHO, Butanal: C₃H₇CHO
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