organic lab 1

What is the primary purpose of distillation?

• To mix liquids

• To heat solids

• To purify liquid samples

• To cool liquids

What happens to a liquid during the distillation process?

• It becomes a solid

• It turns to gas and then back to liquid

• It evaporates completely

• It freezes

What is the boiling point (B.P.)?

• The temperature at which a solid melts

• The temperature at which a liquid freezes

• The temperature at which a gas condenses

• The temperature at which vapor pressure equals external pressure

In simple distillation, what is the minimum boiling point difference required?

• ≥ 50 °C

• ≤ 50 °C

• ≤ 25 °C

• ≥ 75 °C

What is the role of the fractionating column in fractional distillation?

• To cool the liquid

• To separate components based on boiling points

• To heat the liquid

• To mix the components

What is a characteristic of a volatile substance?

• Low boiling point

• Non-volatile

• High boiling point

• High density

What should be done to avoid bumping during distillation?

• Add more liquid

• Use a larger flask

• Increase the heat rapidly

• Use boiling stones

Why should joints in the distillation apparatus be greased?

• To speed up the process

• To cool the apparatus

• To increase pressure

• To avoid sticking

What is the significance of the normal boiling point?

• It is the temperature at which a gas condenses

• It is the temperature at which a solid melts

• It is the temperature at which a liquid freezes

• It is the temperature at which vapor pressure equals atmospheric pressure

What happens to the high boiling point component in distillation?

• It turns into a solid

• It condenses immediately

• It remains in the boiling flask

• It evaporates first