Alkanes: Crash Course Organic Chemistry #6

What is the process by which liquid wax travels up the wick of a burning candle?

• Evaporation

• Convection

• Capillary action

• Diffusion

Which of the following is a characteristic property of alkanes?

• They are highly reactive.

• They contain functional groups.

• They are non-polar and hydrophobic.

• They are acidic or basic.

Which fraction of crude oil is characterized by molecules with 2 to 4 carbons and boils under 30°C?

• Asphalt

• Petroleum gas

• Octanes

• Paraffin waxes

What type of conformer has higher torsional energy and is considered less stable?

• Staggered conformer

• Skew conformer

• Eclipsed conformer

• Gauche conformer

In a 2D representation of a 3D molecular structure, what does a dashed wedge indicate?

• The group is coming out of the screen towards the viewer.

• The group is pointing into the screen, away from the viewer.

• The group is in the same plane as the screen.

• The group is rotating around a single bond.

What is steric hindrance in the context of molecular conformations?

• The attraction between two oppositely charged groups.

• The repulsion between electron clouds of atoms or groups that are forced too close together.

• The ability of a molecule to rotate freely around a single bond.

• The strain caused by deviation from ideal bond angles.

Which conformer of butane has the lowest torsional strain and lowest energy?

• Totally eclipsed

• Gauche

• Eclipsed

• Anti

What two types of strain combine to form ring strain in cycloalkanes?

• Bond strain and angle strain

• Torsional strain and angular strain

• Steric strain and bond strain

• Conformational strain and steric strain