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.Define nomenclature in the context of organic chemistry. Which of the following correctly identifies the two systems of nomenclature used for organic compounds?
- A.Nomenclature is the process of determining the structure of organic compounds. The two systems are the trivial system and the structural system.
- B.Nomenclature is the system of assigning names to organic compounds. The two systems are the trivial system (common names) and the IUPAC system (systematic names).
- C.Nomenclature refers to the classification of organic compounds by their physical properties. The two systems are the empirical system and the molecular system.
- D.Nomenclature is the method of synthesizing organic compounds. The two systems are the traditional system and the modern system.
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2.The reaction in which the hydrogen of an alkane is replaced by another element like chlorine is called:
- A.Addition reaction
- B.Substitution reaction
- C.Polymerization reaction
- D.Combustion reaction
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3.What is a functional group, and which of the following correctly describes it along with two valid examples?
- A.A functional group is an atom or group of atoms that defines the structure and properties of a family of organic compounds. Examples: Hydroxyl group (-OH) in alcohols and Carboxyl group (-COOH) in carboxylic acids.
- B.A functional group is a carbon chain that determines the physical state of an organic compound. Examples: Alkyl group (-CH3) in alkanes and Amino group (-NH2) in amines.
- C.A functional group is a type of bond that changes the molecular weight of an organic compound. Examples: Double bond (C=C) in alkenes and Triple bond (C≡C) in alkynes.
- D.A functional group is a single atom that alters the color of an organic compound. Examples: Chlorine (-Cl) in chloroalkanes and Oxygen (-O) in ethers.
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4.What is the IUPAC name of the following compound? ``` CH3 CH3 | | CH3 - CH2 - CH2 - C - CH2 - CH3 | CH3 ```
- A.2,2-Dimethylhexane
- B.3,3-Dimethylhexane
- C.2-Ethyl-2-methylpentane
- D.3-Methyl-3-ethylpentane
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5.What is the general formula for the aldehyde series?
- A.CₙH₂ₙ₊₂CHO
- B.CₙH₂ₙ₊₁CHO (where n = number of carbon atoms)
- C.CₙH₂ₙCHO
- D.CₙH₂ₙ₋₂CHO
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