Quiz  /  Covalent Bonding Class 9 MCQ Questions With Answers

  • 1. 
    What would you name this molecule?

  • SNa3
  • H3O
  • NaCl
  • H2O

  • 2. 
    Explain why methane has a low melting point

  • It is a simple molecular substance with weak forces between the molecules (which are easy to break)
  • It is a simple molecular substance with strong forces between the molecules (which are difficult to break)

  • 3. 
    If a you saw the following, K+; what does it tell you about the the ion.

  • it has lost one electron
  • it has lost one proton
  • it has lost two electrons
  • it is a negative ion

  • 4. 
    Electrons have a charge of:

  • -1
  • -2
  • +1
  • +2

  • 5. 
    Describe the structure of simple covalent molecules

  • Strong covalent bonds between atoms, weak forces holding the molecules together
  • Weak covalent bonds between atoms, weak forces holding the molecules together
  • Weak covalent bonds between atoms, strong forces holding the molecules together
  • Strong covalent bonds between atoms, strong forces holding the molecules together

  • 6. 
    What is the charge of a sodium ion with 11 protons and 10 electrons?

  • 1+
  • 1-
  • 2+
  • 2-

  • 7. 
    What does a sodium atom become when it loses its only valence electron?

  • sodium compound
  • sodium atom
  • ionic compound
  • sodium ion

  • 8. 
    In the correct Lewis structure for water, how many unshared pairs of electrons will oxygen have?

  • 1
  • 4
  • 3
  • 2

  • 9. 
    The chemical formula for Bromine monofluoride is:

  • Br1F1
  • BrF
  • Br2F
  • BrF2

  • 10. 
    What type of substance are methane and water?

  • Giant covalent molecules
  • Simple covalent molecules
  • Giant ionic lattice
  • Metallic structure

  • 11. 
    Explain why chlorine and fluorine form covalent bonds

  • They are both metals
  • They are both non-metals
  • One is a metal and one is a non-metal
  • They are both semi-metals

  • 12. 
    What is the name given to the structure of diamond, graphite and silicon dioxide?

  • Mega covalent structure
  • Mega ionic lattice
  • Giant covalent
  • Giant ionic

  • 13. 
    Which LD Diagram is correct for chloromethane (CH3Cl)

  • A
  • B
  • C
  • D

  • 14. 
    Most atoms have no net charge because they have....

  • an equal number of charged and non-charged particles
  • neutrons in their nuclei
  • an equal number of electrons and protons
  • an equal number of neutrons and protons

  • 15. 
    Which of the following is the correct Lewis structure for CH2O?

  • Option A
  • Option B
  • Option C
  • Option D

  • 16. 
    What are intermolecular forces?

  • Strong forces between molecules which keep them apart
  • Weak forces between molecules which keep them apart
  • Strong forces between molecules which hold them together
  • Weak forces between molecules which hold them together

  • 17. 
    What is a fullerene?

  • Substance made of carbon atoms arranged in a cage
  • Several layers of graphite
  • One layer of graphite
  • A tube shaped layer of carbon atoms

  • 18. 
    Explain why graphite conducts electricity

  • It is made of metal ions
  • It has delocalised electrons between the layers that can move through the graphite
  • Each carbon atom has 4 electrons on its outer shell, it uses all 4 electrons to conduct electricity
  • The ions are free to move

  • 19. 
    Explain why most giant covalent substances do not conduct electricity.

  • There are no electrons/ions/charged particles that are free to move
  • The electrons/ions/charged particles that are free to move
  • The electrons/ions/charged particles cannot carry the charge
  • There are not enough electrons/ions/charged particles to carry the charge through the structure

  • 20. 
    Protons have a charge of:

  • -1
  • +1
  • -2
  • +2

  • 21. 
    Explain why graphite can act as a lubricant

  • The carbon atoms in graphite cause very little friction.
  • The carbon atoms are in a liquid state
  • Weak forces between carbon atoms are free to slide over each other
  • Weak forces between layers which are free to slide over each other

  • 22. 
    Complete the sentence: In covalent bonds, electrons are _______________________

  • Lost
  • Gained
  • Halved
  • Shared

  • 23. 
    After drawing in your bonds, what do you do if you don't have enough electrons to get each atom to its octet?

  • Place dots until everything has eight
  • Place dots only around the terminal atoms
  • Add a multiple bond
  • Have eight only around the central atom

  • 24. 
    The chemical name of Pā‚„Sā‚ā‚€ is:

  • phosphorous sulfide
  • phosphorus sulfide
  • tetraphosphorus decasulfide
  • phosphorus (X) sulfide

  • 25. 
    What is graphene?

  • A sphere shaped structure of carbon atoms
  • Several layers of graphite
  • One layer of graphite
  • A tube shaped layer of carbon atoms

  • 26. 
    In a covalent bond, one or more electrons are?

  • shared
  • lost
  • gained
  • transferred

  • 27. 
    Which of these are an ion?

  • 3 protons, 3 neutrons, 3 electrons.
  • 8 protons, 8 neutrons, 8 electrons
  • 2 protons, 3 neutrons, 2 electrons
  • 6 protons, 6 neutrons, 7 electrons

  • 28. 
    If electrons are shared unequally then the bond is....

  • Non-polar covalent
  • Ionic
  • Non-polar ionic
  • Polar covalent
Report Question
warning
access_time
  Time