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.

Sample questions

1. 1.The total number of double and triple bonds in the structure, $(CN)_2C = C(CN)_2$ are
   • a.1
   • b.5
   • c.9
   • d.Unpredictable
2. 2.What is the basic tendency of an atom that makes it combine with other atoms?
   • A.To lose or gain protons to achieve a stable nucleus.
   • B.To attain a stable electronic configuration, typically that of the nearest noble gas.
   • C.To increase its atomic mass by sharing neutrons with other atoms.
   • D.To reduce its energy by expelling all valence electrons.
3. 3.(b) Select the right answer — (i) Sodium chloride — covalent bond / ionic bond / covalent and coordinate bond. (ii) Ammonium ion — covalent bond / ionic bond / covalent and coordinate bond. (iii) Carbon tetrachloride — covalent bond / ionic bond / covalent and coordinate bond.
4. 4.In the electron dot diagram of a hydronium ion (H₃O⁺), where is the lone pair of electrons located?
   • A.On one of the hydrogen atoms
   • B.On the oxygen atom
   • C.Between oxygen and hydrogen atoms
   • D.There is no lone pair in H₃O⁺
5. 5.Which of the following sets of conditions correctly describes the formation of an electrovalent bond?
   • A.One atom must have high ionization energy, the other must have low electron affinity, and the ions must repel each other.
   • B.One atom must easily lose electrons, the other must easily gain electrons, and the resulting ions must have stable electronic configurations with strong electrostatic attraction.
   • C.Both atoms must have high ionization energy and low electron affinity, forming shared electron pairs.
   • D.The atoms must have identical electronegativities and form neutral molecules without charge separation.