S2.2 The covalent model (SL)
15 revision questions with answers for S2.2 The covalent model (SL). Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Bond formed by a shared pair of electrons between two atoms?
- Covalent bondRight answer
- Ionic bond
- Metallic bond
- Hydrogen bond
What this set covers
Covalent bonding at SL: shared pairs, coordination bonds, bond length and strength, shapes and bond angles of CH₄, NH₃, BF₃, H₂O and CO₂, polarity, intermolecular forces, giant covalent carbon and Rf values.
- Common mix-up
- Students often confuse a polar bond with a polar molecule: CO₂ has polar bonds but no overall dipole because its linear shape cancels them.
- Revision tip
- Draw CH₄, NH₃ and H₂O side by side, add lone pairs, and state each bond angle to see the trend as lone pairs increase.
All 15 questions and answers
Bond formed by a shared pair of electrons between two atoms?
Answer: Covalent bond
Covalent bond in which both shared electrons come from one atom?
Answer: Coordination bond
Which carbon–carbon bond is the shortest and strongest?
Answer: Triple bond
Molecular geometry of CH₄?
Answer: Tetrahedral
Molecular geometry of NH₃?
Answer: Trigonal pyramidal
Molecular geometry of BF₃?
Answer: Trigonal planar
H–O–H bond angle in water?
Answer: 104.5°
O–C–O bond angle in carbon dioxide?
Answer: 180°
Molecule with polar bonds but no overall dipole?
Answer: CO₂
Strongest intermolecular force between water molecules?
Answer: Hydrogen bonding
Only intermolecular force between non-polar molecules such as I₂?
Answer: London dispersion forces
Halogen boiling points rise down group 17 mainly because of an increasing…?
Answer: Number of electrons
Number of carbon atoms each carbon in diamond is covalently bonded to?
Answer: 4
Allotrope of carbon with stacked layers that conducts electricity?
Answer: Graphite
Covalent bond in which the shared electron pair is pulled unequally towards one atom, giving partial charges?
Answer: Polar covalent bond
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.