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.The electronic configuration of a fluoride ion is the same as that of a neon atom. What is the key difference between the two?
- A.The fluoride ion has one more proton than the neon atom, making it positively charged.
- B.The fluoride ion has 9 protons and 10 electrons, resulting in a net negative charge, while neon is neutral with 10 protons and 10 electrons.
- C.Both have identical nuclear charges and differ only in their physical states.
- D.The neon atom has one fewer electron than the fluoride ion, giving it a net positive charge.
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2.126. 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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3.What is covalency in the context of chemical bonding?
- A.The number of electrons an atom shares to form covalent bonds, e.g., Hydrogen shares 1 in H₂.
- B.The total number of electrons present in the outermost shell of an atom.
- C.The number of ionic bonds an atom can form with other atoms.
- D.The charge acquired by an atom after gaining or losing electrons.
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4.Compare carbon tetrachloride and sodium chloride with regard to their solubility in water and electrical conductivity. Which of the following statements correctly describes their properties?
- A.Carbon tetrachloride is soluble in water and conducts electricity; sodium chloride is insoluble and does not conduct electricity.
- B.Carbon tetrachloride is insoluble in water and does not conduct electricity; sodium chloride is soluble in water and conducts electricity in molten and aqueous states.
- C.Both carbon tetrachloride and sodium chloride are soluble in water, but only sodium chloride conducts electricity.
- D.Carbon tetrachloride conducts electricity in aqueous solution; sodium chloride is insoluble in water but conducts electricity when solid.
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5.54. 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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