Core questions – Chemistry unit 7 - Organic chemistry

What is an organic compound?

• Something that contains carbon atoms

• A substance that contains only metals

• A compound made only of water

• A material that contains only oxygen atoms

How did crude oil form?

• From the remains of dead animals and plants millions of years ago

• From the cooling of molten lava

• By the condensation of water vapor in the atmosphere

• From the crystallization of minerals in rocks

What is crude oil a mixture of?

• Hydrocarbons

• Carbohydrates

• Proteins

• Salts

What is a hydrocarbon?

• Molecules made up of hydrogen and carbon atoms only

• Molecules made up of hydrogen and oxygen atoms only

• Molecules made up of carbon and nitrogen atoms only

• Molecules made up of hydrogen, carbon, and chlorine atoms

What is an alkane?

• A saturated hydrocarbon

• An unsaturated hydrocarbon

• A compound containing a benzene ring

• A hydrocarbon with triple bonds

What is the general formula for an alkane?

• CₙH₂ₙ₊₂

• CₙH₂ₙ

• CₙH₂ₙ₋₂

• CₙHₙ

What is a saturated hydrocarbon?

• Contains only single covalent bonds between atoms

• Contains at least one double bond between atoms

• Contains at least one triple bond between atoms

• Contains both double and triple bonds between atoms

What is displayed formula?

• Represents the covalent bonds present in a molecule as lines

• Shows only the number of atoms in a molecule

• Represents the 3D structure of a molecule

• Indicates the molecular mass of a compound

How do we name alkanes?

• Look at the carbon chain length, apply the right prefix and add ‘ane’ on the end

• Count the number of hydrogen atoms and add ‘ene’ at the end

• Use the number of double bonds to determine the name

• Name them based on the color of the compound

What is the prefix for 1 carbon?

• Meth-

• Eth-

• Prop-

• But-