ICSE Class 10 Chemical Bonding — Mock Test (2027)
Free online mock test for Chemical Bonding (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 Chemical Bonding 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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1.54. Assertion: Graphite is a good lubricant. Reason: Graphite has layers of carbon atoms that can slide over each other easily. (a) Assertion and reason both are correct statements and reason is the correct explanation of the assertion. (b) Assertion and reason both are correct statements, but reason is not the correct explanation of the assertion. (c) Assertion is false, but reason is true (d) Assertion is true, but reason is false.
- A.Assertion and reason both are correct statements and reason is the correct explanation of the assertion.
- B.Assertion and reason both are correct statements, but reason is not the correct explanation of the assertion.
- C.Assertion is false, but reason is true
- D.Assertion is true, but reason is false.
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2.(a) Select the correct answer from A, B, C and D — Metals lose electrons during ionization — this change is called
- A.Oxidation
- B.Reduction
- C.Redox
- D.Displacement
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3.Which of the following correctly explains the formation of a single covalent bond with an example?
- A.A single covalent bond is formed by the sharing of one pair of electrons between two atoms, e.g., the hydrogen molecule (H₂).
- B.A single covalent bond is formed by the transfer of one electron from one atom to another, e.g., sodium chloride (NaCl).
- C.A single covalent bond is formed when two atoms share two pairs of electrons, e.g., the oxygen molecule (O₂).
- D.A single covalent bond occurs when one atom donates both electrons in the shared pair, e.g., the ammonium ion (NH₄⁺).
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4.What is the meaning of a lone pair of electrons?
- A.A pair of valence electrons that is not shared with another atom and remains localized on one atom.
- B.A pair of electrons that is shared equally between two atoms in a covalent bond.
- C.A single unpaired electron that participates in bond formation with another atom.
- D.A pair of electrons found in the innermost shell of an atom, not involved in bonding.
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5.(a) Which of the following is not a common characteristic of an electrovalent compound?
- A.High melting point.
- B.Conducts electricity when molten.
- C.Consists of oppositely charged ions.
- D.Ionizes when dissolved in water.
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