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.In the electron dot structure of a water molecule shown below, which labelled part represents the shared pair of electrons forming a single covalent bond between oxygen and hydrogen?
(Note: Assume the diagram shows oxygen with two lone pairs and two shared pairs with hydrogen atoms.)- A.The dots around oxygen not paired with hydrogen (lone pairs)
- B.The pair of dots between oxygen and each hydrogen atom
- C.The single dot on each hydrogen atom before bonding
- D.The entire arrangement of dots around oxygen (octet)
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2.In the electron dot structure of an ammonia molecule shown below, which labelled part represents the lone pair of electrons on the nitrogen atom?
(Note: Assume the diagram shows nitrogen bonded to three hydrogen atoms with shared pairs and one additional pair of electrons on nitrogen.)
- A.The three lines connecting N to each H atom
- B.The pair of dots adjacent to the nitrogen atom but not bonded to hydrogen
- C.The single dots around each hydrogen atom
- D.The circle enclosing the entire NH₃ structure
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3.Assertion: Water is a polar molecule. Reason: Water has a bent molecular shape and an unequal distribution of electrons. (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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4.129. Why is the methane molecule (CH₄) classified as a non-polar covalent compound?
- A.The carbon atom has a higher electronegativity than hydrogen, creating polar bonds.
- B.Its tetrahedral structure symmetrically distributes the four C-H bonds, resulting in no net charge separation.
- C.Methane forms ionic bonds between carbon and hydrogen atoms.
- D.The molecule has a linear shape, canceling out dipole moments.
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5.Covalent compounds generally exist as gases, liquids, or soft solids because of which property?
- A.Strong force of attraction between molecules
- B.Weak force of attraction between constituent particles
- C.High molecular weight
- D.Presence of ionic bonds
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