16. Hydrocarbons And Organic Compounds

Question 1

What are hydrocarbons?

Answer 1

Organic compounds with contain only hydrogen and carbon.

Question 2

What are the three classes of hydrocarbons?

Answer 2

Alkanes, alkenes, alkynes

Question 3

What are the properties of Alkanes?

Answer 3

Hydrocarbons which have only single bonds between the carbon atoms. The formula is CnH2n+2

Question 4

What are the properties of alkenes?

Answer 4

Hydrocarbons with at least one carbon to carbon double bond.

Formula is CnH2n

Question 5

What are alkynes?

Answer 5

Hydrocarbons with at least one triple bond (carbon to carbon).
Formula is CnH2n-2

Question 6

Are Alkanes saturated or unsaturated molecules?

Answer 6

Alkanes are saturated molecules because all the bonds between the carbons are single ones and the molecules hold as many hydrogen so as possible.

Question 7

Are alkenes and alkynes saturated or unsaturated molecules?

Answer 7

They are unsaturated as they contain less than the maximum number of hydrogen possible due to double or triple bonds.

Question 8

What are physical properties of Alkanes?

Answer 8

Colourless
Oily odour
Alkanes can be gases solids or liquids
The more carbon the higher the melting/boiling point because the molecules are heavier

Insoluble in water
Alcohols are good solvents
Neutral ph