GCSE organic intro

A hydrocarbon is...

• only found in oil

• a molecule containing the atoms carbon and hydrogen

• flammable

• contains only carbon and hydrogen

Alkanes are

• saturated

• have the general formula C_nH_2n+2

• A homologous series

• all of the above

Which statement is true about Alkanes?

• related to cycloalkanes

• flammable

• All end in -ane

• Only used to power cars

identify the following molecule

• septane

• octane

• heptane

• methylhexane

Carbon can form 4 covalent bonds because

• It has 6 electrons

• It is in group 4

• it loses 4 electrons

• when a pair of electrons is shared between to atoms

A homologous series is a family of molecules which

• have the same general formula

• the same physical properties

• the same chemical properties

• all of the above

which statement is untrue

• Alkanes have the same chemical properties and trend in physical properties

• The cycloalkanes are a homologous series

• In fractional distillation the boiling point of fractions increases up the column

• In fractional distillation the viscosity increases down the column

when burnt hydrocarbons can produce

• carbon dioxide

• carbon monoxide

• carbon

• water

• all of the above

which statement is untrue

• alkenes are found in crude oil

• alkanes can be made by cracking

• alkenes can be made by cracking

• alkenes are unsaturated

Which one is the odd one out

• A

• B

• C

• D