IB Chemistry Topic 4

Which describes correctly the bonding type and melting point of carbon and carbon-dioxide?

• C: covalent/high melting point

  CO₂: covalent/low melting point

• C: ionic/lowmelting point

  CO₂: ionic/high melting point

• C: ionic/high melting point

  CO₂: ionic/low melting point

• C: covalent/lowmelting point

  CO₂: covalent/high melting point

Tags

NGSS.HS-PS1-3

Which compound forms hydrogen bonds in the liquid state?

• C₂H₅OH

• CHCl₃

• CH₃CHO

• (CH₃CH₂)₃N

Which molecule has a non-bonding (lone) pair of electrons around the central atom?

• BF₃

• SO_2

• PCl_5

• SiF₄

What does malleable mean?

• able to be shaped
• will break easily
• can be used for wire
• is shiny

Which species does not have delocalized electrons

• NO₃^–

• NO₂^–

• O₃

• C₃H₆

Tags

NGSS.HS-PS1-1

Which of the following is true about C₆₀ ?

• Each carbon bonded covalently to 3 other carbon atoms in a hexagonal ball-like structure

• Each carbon bonded covalently to 4 other carbon atoms in layers

• a giant lattice structure

• pentagonal in shape

Tags

NGSS.HS-PS1-3

Which species contain a coordinate (dative) covalent bond?

I HCHO

II CO

III H₃O⁺

• I and II only

• I and III only

• II and III only

• I, II, and III

What is the basis of a metallic bond?

• the attraction of neutral metal atoms.
• the attraction between protons and neutrons.
• the attraction between positive metal ions and interlocking electrons.
• the attraction between positive metal ions and free floating electrons.

Which bonds are arranged in order of increasing polarity?

• H–F < H–Cl < H–Br < H–I

• H–I < H–Br < H–F < H–Cl

• H–I < H–Br < H–Cl < H–F

• H–Br < H–I < H–Cl < H–F

Tags

NGSS.HS-PS1-3

Who could this be? 

• CO₂
• NH₃
• H₂S
• CH₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2