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.

Sample questions

1. 1.The IUPAC name of $(\mathrm{CH_3})_2\mathrm{CHCOOH}$ is:
   • A.propan-2-oic acid
   • B.iso-butanoic acid
   • C.2-methyl butanoic acid
   • D.2-methyl propanoic acid
2. 2.Which of the following correctly lists the IUPAC names and molecular formulas for the first four alkanes?
   • A.Methane: CH₄, Ethane: C₂H₆, Propane: C₃H₈, Butane: C₄H₁₀
   • B.Methane: CH₄, Ethane: C₂H₄, Propane: C₃H₆, Butane: C₄H₈
   • C.Methane: CH₃, Ethane: C₂H₅, Propane: C₃H₇, Butane: C₄H₉
   • D.Methane: CH₄, Ethene: C₂H₄, Propene: C₃H₆, Butene: C₄H₈
3. 3.In the laboratory preparation of acetylene, what reactant is added to calcium carbide to produce the gas?
   • A.Hydrochloric acid
   • B.Water
   • C.Sodium hydroxide
   • D.Oxygen gas
4. 4.Methane and ethane react with chlorine through substitution. Which of the following correctly describes the reaction conditions and the product formed in the first substitution step for methane?
   • A.The reaction occurs in the presence of ultraviolet (UV) light or heat, producing CH₃Cl and HCl.
   • B.The reaction occurs spontaneously at room temperature, producing CH₂Cl₂ and H₂.
   • C.The reaction requires a catalyst like nickel, producing C₂H₆ and Cl₂.
   • D.The reaction occurs in the dark, producing CH₄ and Cl₂ as the main products.
5. 5.Which of the following correctly represents the chemical equation(s) for the reaction of ethyne with chlorine in an inert solvent of carbon tetrachloride?
   • A.C₂H₂ + Cl₂ → C₂H₃Cl + HCl
   • B.C₂H₂ + Cl₂ → C₂H₂Cl₂ (1,2-dichloroethene); C₂H₂Cl₂ + Cl₂ → C₂H₂Cl₄ (1,1,2,2-tetrachloroethane)
   • C.C₂H₂ + 2Cl₂ → C₂H₂Cl₄ (directly)
   • D.C₂H₂ + Cl₂ → C₂HCl + HCl (substitution)