Intro to organic chem

Which element do MOST organic compounds contain?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

Hydrocarbons are organic compounds that contain which elements?

• Carbon only

• Hydrogen only

• Carbon and hydrogen only

• Either carbon or hydrogen

How are organic compounds grouped into homologous series?

• By the number of carbon atoms in the compound

• By the number of hydrogen atoms in the compound

• By the functional group in the compound

Which is NOT a general characteristic of compounds in the same homologous series?

• They have the same functional group

• They have similar chemical properties

• There is gradual change in their physical property down the series

• They have the same number of carbon atoms

What is another name for petroleum?

• Crude oil

• Natural gas

• Petrol

• Petroleum gas

Petroleum(crude oil) is a ............................?

• Element

• Compound

• Mixture

Which method of separation is used to separate the hydrocarbons in petroleum?

• Simple distillation

• Fractional distillation

• Filtration

• Evaporation

The temperature is the ......................... at the bottom of the fractionating column

Heavier fractions of hydrocarbons have ......................... boiling points and collect at the ............................ sections of the fractionating column.

• lower; lower

• higher; lower

• higher; higher

• lower; higher

What is the name of the lightest fraction collected from the fractional distillation of petroleum?

• Bitumen

• Kerosene

• Petrol

• Petroleum gas