Chemistry 1B PASS W6

How many valence electrons does Carbon have?

• 2

• 3

• 4

• 5

In Kekule structures, what does a line drawn between two atoms indicate?

• a single electron bond

• A 2 electron covalent bond

• A 4 electron covalent bond

• A hydrogen bond

How are valence electrons of an atom shown in Lewis structures?

• As lines

• As dots

• As triangles

• As squares

Which hydrocarbon type is saturated?

• Alkane

• Alkene

• Alkyne

• Aromatic

Which of the following alkanes has the highest boiling point?

• methane

• octane

• decane

• propane

What type of force is the only force between alkane molecules?

• Hydrogen bonds

• Ionic bonds

• Covalent bonds

• van der Waals

What are Alkenes and Alkynes classed as?

• Saturated hydrocarbons

• Unsaturated hydrocarbons

• Aromatic hydrocarbons

• Aliphatic hydrocarbons

Which of the following is true about alkenes and alkynes?

• They are less reactive than alkanes

• They are more reactive than alkanes

• They have the same reactivity as alkanes

• They are not reactive

What type of hybridisation occurs in alkynes?

• sp

• sp2

• sp3

• sp3d

What do organic chemists use curved arrow notations for?

• To describe the redistribution of two valence electrons within a molecule

• To show the molecular weight of a compound

• To indicate the presence of a nucleophile

• To identify the type of bond present in a molecule