EASE 1 preparation - Chemical Bonding past paper

Which diagram represents the outer-shell electron arrangement in a nitrogen molecule?

• A

• B

• C

• D

Which row describes the formation of single covalent bonds in methane?

• A

• B

• C

• D

Ammonia, NH₃ is covalent molecule

Which diagram shows the outer-shell electron arrangement in a molecule of ammonia?

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• 
• 
• 

Which substance has a giant covalent structure?

• ethanol

• graphite

• methane

• sodium chloride

Which statement describes the properties of both diamond and silicon(IV) oxide?

• They are brittle, with a low melting point, and are insoluble in water.

• They are hard, with a high melting point, and are electrical insulators.

• They are malleable, with a high melting point, and are electrical conductors.

• They are soft, with a low melting point, and are electrical insulators.

Which row about metals and ionic compounds is correct?

• A

• B

• C

• D

The diagrams shows the structures of three macromolecules P, Q and R

• A

• B

• C

• D

Which row shows the properties of an ionic compound?

• A

• B

• C

• D

Which row describes properties of lithium uoride?

• A

• B

• C

• D

Which statement explains why graphite can be used as a lubricant?

• All of the atoms in graphite are carbon.

• Each carbon atom forms three bonds.

• Graphite has a macromolecular structure.

• The layers in graphite can slide over each other.