IB Chemistry Final Review Part 2

A substance has the following properties:

Melting Point = 1414°C

Electrical Conductivity when Molten = None

Electrical Conductivity when Solid = None

• Network covalent

• Polar covalent compound

• Ionic compound

• Metallic substance

Tags

NGSS.HS-PS1-3

Which two atoms have the most polar bond?

• C and F

• C and Cl

• Si and F

• Si and Cl

Which combination describes the sulfate(IV) ion, SO₃^2- (also known as the sulfite ion)?

• Number of electron domains around S = 3
  Electron domain geometry = trigonal planar
  Molecular geometry = trigonal planar
  O-S-O angle = 120º

• Number of electron domains around S = 3
  Electron domain geometry = tetrahedral
  Molecular geometry = trigonal pyramidal
  O-S-O angle = 109.5º

• Number of electron domains around S = 4
  Electron domain geometry = trigonal pyramidal
  Molecular geometry = trigonal pyramidal
  O-S-O angle = 107º

• Number of electron domains around S = 4
  Electron domain geometry = tetrahedral
  Molecular geometry = trigonal pyramidal
  O-S-O angle = 107º

Which correctly states the strongest intermolecular forces in the compounds below?

• CH₄ = dipole-dipole
  CH₃Cl = London forces
  CH₃NH₂ = hydrogen-bonding

• CH₄ = London forces
  CH₃Cl = dipole-dipole
  CH₃NH₂ = hydrogen-bonding

• CH₄ = hydrogen-bonding
  CH₃Cl = London forces
  CH₃NH₂ = dipole-dipole

• CH₄ = London forces
  CH₃Cl = hydrogen-bonding
  CH₃NH₂ = dipole-dipole

What is the order of increasing boiling point?

• C₄H₁₀ < CH₃COOH < CH₃CH₂CHO < CH₃CH₂CH₂OH

• C₄H₁₀ < CH₃CH₂CHO < CH₃CH₂CH₂OH < CH₃COOH

• CH₃COOH < CH₃CH₂CH₂OH < CH₃CH₂CHO < C₄H₁₀

• C₄H₁₀ < CH₃CH₂CH₂OH < CH₃CH₂CHO < CH₃COOH

Which describes an atom of bismuth, Bi (Z = 83)?

• Energy Level = 5
  Valence Electrons = 3

• Energy Level = 5
  Valence Electrons = 5

• Energy Level = 6
  Valence Electrons = 5

• Energy Level = 6
  Valence Electrons = 15

Tags

NGSS.HS-PS1-1

Which formula is correct?

• NH₄PO₄

• (NH₄)₂PO₄

• (NH₄)₃PO₄

• (NH₄)₃(PO₄)₂

Which compound contains both ionic and covalent bonds?

• MgO

• CH₂Cl₂

• CH₃COOH

• NaOH

Which substance is most likely to be ionic?

• Melting Point: High
  Solubility in Hexane: Low
  Electrical Conductivity of Solid: High

• Melting Point: Low
  Solubility in Hexane: Low
  ​​​​​​​Electrical Conductivity of Solid: Low

• Melting Point: Low
  Solubility in Hexane: High
  Electrical Conductivity of Solid: Low

• Melting Point: High
  Solubility in Hexane: Low
  Electrical Conductivity of Solid: Low

Tags

NGSS.HS-PS1-3

In which molecule does the central atom have an incomplete octet of electrons?

• H₂Se

• PH₃

• OF₂

• BF₃

Tags

NGSS.HS-PS1-3