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.Which electron dot diagram correctly represents the structure of the hydronium ion, and what type of bonding is present in it?
- A.[H—O•—H]⁺ with a coordinate covalent bond between O and H⁺
- B.[H—O—H]⁺ with all single covalent bonds only
- C.[H—O—H]⁺ with a double bond between O and H⁺
- D.[H—O•—H]⁺ with an ionic bond between O and H⁺
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2.There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively. What is the molecular formula of the compound formed between E and G, and what type of chemical bond is present in this compound?
- A.Molecular formula: E₂G; bond type: covalent
- B.Molecular formula: EG; bond type: ionic
- C.Molecular formula: EG₂; bond type: metallic
- D.Molecular formula: E₂G₃; bond type: coordinate
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3.Which process describes the formation of ions from neutral molecules or atoms?
- A.Dissociation
- B.Ionisation
- C.Sublimation
- D.Neutralisation
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4.Using an electron dot diagram (Atomic No.: N = 7 and H = 1), which of the following correctly describes the formation of the ammonium ion (NH₄⁺)?
- A.A proton (H⁺) bonds with NH₃ by sharing electrons equally with nitrogen.
- B.Nitrogen in NH₃ donates its lone pair to a proton (H⁺), forming a co-ordinate bond.
- C.Hydrogen atoms in NH₃ lose electrons to form NH₄⁺.
- D.Nitrogen gains an extra electron from hydrogen to form NH₄⁺.
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5.Ionic compounds typically exhibit high melting points. What is the primary reason for this property?
- A.Weak electrostatic forces between ions.
- B.Strong covalent bonds within molecules.
- C.Strong electrostatic forces between oppositely charged ions.
- D.Presence of free-moving electrons.
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