organic chemistry yr 10

what is crude oil?

• dark , smelly liquid

• light, smelly liquid

• contains different elements other than carbon

• are not hydrocarbons

why is oil so important in society?

• it is cheap

• it is expensive

• to make fuels, plastic and other products

• to make fuels only

why can you separate crude oil using distillation?

• because it is a mixture with different melting points

• because it is a mixture with different boiling points

• because it is a cheaper option

• because there is no other way of separation

which one is a saturated product?

• ethene

• propene

• ethane

• butene

how does the size of a hydrocarbon molecule affect the boiling point?

• larger hydrocarbon- lower boiling point

• larger hydrocarbon- higher boiling point

• smaller hydrocarbon- higher boiling point

• none of the above

if a hydrocarbon burns easily, does it -->

• have a long chain

• have a short chain

• burn with black smoke

• burn with smell and dark smoke

which is a positive test for products of hydrocarbon ?

• lime water for carbon dioxide

• bromine water

• lime water and cobalt chloride paper

• lime water and litmus paper

what happens when hydrocarbons are cracked?

• distillation

• cracking

• evaporation

• thermal decomposition

positive test for unsaturated hydrocarbon

• Iodine test

• chlorine test

• Iodine test

• Bromine test

saturated hydrocarbons have

• double bonds

• single bonds

• single covalent bonds

• double or single bonds