Understanding Alkenes: Physical Properties and Boiling Points

Which of the following is NOT a physical property of alkenes?

• Colorless

• Insoluble in water

• Conduct electricity

• Lower density than water

What happens to the boiling point of alkenes as the number of carbon atoms increases?

• It fluctuates

• It increases

• It remains constant

• It decreases

At room temperature, which state do the first three alkenes exist in?

• Liquid

• Plasma

• Gas

• Solid

What is the primary intermolecular force affecting the boiling points of alkenes?

• Covalent bonding

• Hydrogen bonding

• Ionic bonding

• Van der Waals forces

How do the boiling points of alkenes compare to those of alkanes with the same number of carbon atoms?

• Higher

• The same

• Unpredictable

• Lower

Why do alkenes have lower boiling points than alkanes?

• Higher density

• Stronger intermolecular forces

• Fewer electrons

• More hydrogen atoms

What type of molecular structure do alkenes have?

• Metallic

• Ionic

• Giant molecular

• Simple molecular

Which factor contributes to the low boiling points of alkenes?

• Weak intermolecular forces

• High electron count

• Strong covalent bonds

• High molecular weight

What is the effect of fewer hydrogen atoms in alkenes compared to alkanes?

• Weaker intermolecular forces

• Higher boiling points

• Stronger intermolecular forces

• More electrons

Why is less energy required to boil alkenes compared to alkanes?

• Stronger Van der Waals forces

• Fewer carbon atoms

• Weaker intermolecular forces

• Higher density