ICSE Class 10 Chemical Bonding and Molecular Structure — Mock Test

Free online mock test for Chemical Bonding and Molecular Structure (ICSE Class 10 Chemistry) — 92 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Which one of the following statements about the VSEPR theory is INCORRECT?
   • A.The shape of a molecule depends on the number of valence shell electron pairs around the central atom
   • B.A multiple bond is treated as if it were a single electron pair (a single super pair)
   • C.Lone pair electrons occupy less space than bonding pairs of electrons
   • D.Electron pairs tend to occupy positions that minimise repulsion and maximise the distance between them
2. 2.Expanded octet (more than eight valence electrons around the central atom) is possible only for elements that have available:
   • A.d orbitals
   • B.f orbitals
   • C.Only s orbitals
   • D.Only p orbitals
3. 3.Assertion (A): The stability of an ionic compound such as NaCl is judged by its lattice enthalpy rather than merely by attainment of octet in the gaseous state. Reason (R): The sum of the ionization enthalpy of Na and the electron gain enthalpy of Cl is positive, yet NaCl is stable because the energy released in lattice formation more than compensates for it.
   • A.Both A and R are true and R is the correct explanation of A
   • B.Both A and R are true but R is NOT the correct explanation of A
   • C.A is true but R is false
   • D.A is false but R is true
4. 4.According to Fajans rules, the covalent character of an ionic bond is greater when:
   • A.The cation is small and the anion is large
   • B.The cation is large and the anion is small
   • C.Both ions are large
   • D.The charge on the cation is small
5. 5.He2 molecule does not exist because its bond order is:
   • A.Zero
   • B.One
   • C.Two
   • D.Three