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.Describe the laboratory preparation of ethane by the reduction of ethyl bromide. Which of the following correctly represents the method and the balanced chemical equation for the reaction?
- A.Ethane is prepared by reducing ethyl bromide with chlorine gas, producing ethane and hydrogen bromide. Equation: CH₃CH₂Br + Cl₂ → C₂H₆ + HCl
- B.Ethane is prepared by reducing ethyl bromide with nascent hydrogen (e.g., using zinc and hydrochloric acid). Equation: CH₃CH₂Br + 2[H] → C₂H₆ + HBr
- C.Ethane is prepared by oxidizing ethyl bromide with potassium permanganate, yielding ethane and bromine. Equation: CH₃CH₂Br + KMnO₄ → C₂H₆ + Br₂
- D.Ethane is prepared by heating ethyl bromide with sodium hydroxide, forming ethane and sodium bromide. Equation: CH₃CH₂Br + NaOH → C₂H₆ + NaBr
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2.Name the type of chemical reaction by which C₂Br₆ (X) can be prepared from ethane.
- A.Addition reaction
- B.Substitution reaction
- C.Elimination reaction
- D.Polymerisation reaction
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3.What are functional groups in organic chemistry, and which of the following best represents five common examples of them?
- A.Specific atoms or groups of atoms attached to alkyl groups that determine chemical properties, e.g., –OH, –CHO, –CO–, –O–, –COOH.
- B.Carbon chains that define the physical state of organic compounds, e.g., methane, ethane, propane, butane, pentane.
- C.Types of bonds (single, double, triple) that influence the reactivity of organic molecules, e.g., alkanes, alkenes, alkynes.
- D.Structural isomers that differ in the arrangement of atoms but share the same molecular formula, e.g., butane and isobutane.
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4.Give a balanced equation for the laboratory preparation of ethylene and describe the method used to collect the gas.
- A.C₂H₅OH → (Al₂O₃, 350°C) C₂H₄ + H₂O; collected by downward displacement of water.
- B.C₂H₅OH + O₂ → C₂H₄ + H₂O₂; collected by upward displacement of air.
- C.C₂H₅OH → (ZnCl₂) C₂H₄ + H₂O; collected by downward displacement of air.
- D.C₂H₅OH + H₂SO₄ → C₂H₄ + H₂O; collected over water by upward displacement.
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5.State the common and IUPAC names of the following Compounds. Also indicate the functional group, if any in each case: (a) CH₃—CH₃ (b) CH₂=CH₂ (c) CH≡CH (d) CH₄ (e) C₂H₅—Cl
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