C10 Organic reactions

Question 1

What do all organic molecules contain

Answer 1

carbon atoms

Question 2

C=C grouping is an example of what group?

Answer 2

functional group

Question 3

What does a functional group give?

Answer 3

a ‘family’ of organic compounds their characteristic reactions

Question 4

What is a ‘family’ of organic compounds with the same functional group called?

Answer 4

homologous series

Question 5

Successive members of a homologous series differ from each other by an extra what?

Answer 5

carbon atom that has two hydrogen atoms bonded to it

Question 6

What is the general formula for alkenes?

Answer 6

CnH2n

Question 7

How can you test the ethene gas to see if its an alkene?

Answer 7

using a lighted splint and if it burns smokier and yellow (luminous) flame because there is incomplete combustion in alkenes

Question 8

Do alkanes or alkenes release more energy per mole of combustion?

Answer 8

alkanes

Question 9

Are alkenes or alkanes used as fuels?

Answer 9

alkanes because they release more energy

Question 10

Are alkenes or alkanes more reactive and why

Answer 10

Alkenes are more reactive because of the double carbon bond because they can split the double bond and 1 molecule join each

Question 11

Can you give the formula for dibromoethane

Answer 11

C2H4 + Br2 -> C2H4Br2

Question 12

Can you draw ethene?

Question 13

Can you draw butene

Question 14

What are alkenes?

Answer 14

unsaturated compounds

Question 15

What does the addition of a hydrogen molecule H2 across the double bond of an alkene do?

Answer 15

forms a saturated hydrocarbon - an alkane

Question 16

What conditions are needed to turn and alkane into an alkene?

Answer 16

60c in prescience of a nickel catalyst

Question 17

How do you create ethanol from ethene and steam?

Answer 17

with a catalyst, energy to heat gases and t generate a high temperature

Question 18

Is alkenes reaction with water (steam) reversible or irreversible?

Answer 18

reversible

Question 19

Can you draw the formula for ethanol using ethene and steam

Answer 19

C2H4 + H2O <-> C2H5OH

Question 20

What are the 3 reactions alkenes can react with to form a saturated molecule?

Answer 20

halogen’s, hydrogen and water (steam)