Organic Chem

Question 1

The form of a alkanes and alkenes

Answer 1

The alkanes form a homologous series

Question 2

Properties of homologous series? (4)

Answer 2

have the same general formula

differ by CH2 in molecular formulae from neighbouring members of the series

show a gradual variation in physical properties, such as their boiling points

have similar chemical properties

Question 3

Formula for alkenes and alkanes

Answer 3

CnH2n+2

Question 4

What are alkanes?

Answer 4

saturated hydrocarbons:

Question 5

Why are alkanes saturated?

Answer 5

because their carbon atoms are joined together by single bonds

Question 6

Why are alkanes hydrocarbons?

Answer 6

because they are compounds containing hydrogen and carbon only

Question 7

molecular formula for methane, ethane, propane, butane?

Answer 7

1. CH4
2. C2H6
3. C3H8
4. C4H10

Question 8

Know how to draw the display formula for methane, ethane, propane, butane?

Question 9

molecular formula for ethene, propene, butene, pentene?

Answer 9

1. C2H4
2. C3H6
3. C4H8
4. C5H10

Question 10

Know how to draw the display formula for ethene, propene, butene, pentene?

Question 11

structural formula for methane, ethane, propane, butane?

Answer 11

1. CH4
2. CH3 CH3
3. CH3 CH2 CH3
4. CH3 CH2 CH2 CH3

Question 12

structural formula for ethene, propene, butene, pentene?

Answer 12

1. CH2 CH2
2. CH2 CH CH3
3. CH2 CH CH2 CH3
4. CH2 CH CH2 CH2 CH3