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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1.126. What is the lone pair effect, and in which type of compounds does it typically occur?
- A.The repulsion between shared electron pairs in non-polar molecules like CH₄.
- B.The complete sharing of an unshared electron pair by another atom or ion in polar covalent compounds like HCl and NH₃.
- C.The transfer of electrons from one atom to another in ionic compounds like NaCl.
- D.The delocalization of electrons in metallic bonds like those in copper.
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2.Which of the following does not conduct electricity?
- a.Molten NaOH
- b.Molten KOH
- c.Aqueous NaCl
- d.Solid NaCl
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3.Which of the following sets correctly lists the characteristic properties of electrovalent compounds?
- A.Gaseous at room temperature, low melting points, poor conductors of electricity, do not ionise in solution.
- B.Solid at room temperature, high melting and boiling points, conduct electricity in molten state or solution, ionise in solution.
- C.Liquid at room temperature, moderate melting points, conduct electricity only in solid state, do not ionise in solution.
- D.Solid at room temperature, low melting points, conduct electricity in solid state, ionise only in gaseous state.
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4.$NH_3$ and $BF_3$ form adduct readily because they form
- a.co-ordinate bond
- b.covalent bond
- c.ionic bond
- d.hydrogen bond
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5.53. Assertion: Diamond is a good conductor of electricity. Reason: Diamond has a three-dimensional network of covalent bonds. (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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