Alkenes

Question 1

What is the general formulae of alkenes?

Answer 1

CnH2n

Question 2

What does this phrase mean, Alkenes are unsaturated hydrocarbons.

Answer 2

Alkenes are molecules made of only hydrogen and carbon atoms with at least one double or triple covalent bond.

Question 3

what is alkenes functional group?

Answer 3

C=C

Question 4

how many carbon atoms are in ethene?

Answer 4

2

Question 5

how many carbon atoms are in propene ?

Answer 5

3

Question 6

how many carbon atoms are in butene ?

Answer 6

4

Question 7

how many carbon atoms are in pentene ?

Answer 7

5

Question 8

what is the word equation for ethenes reaction with bromine?

Answer 8

ethene + bromine —> dibromoethane

Question 9

what happens to ethenes double bond when reacted with bromine?

Answer 9

it breaks

Question 10

what would the colour change be in alkenes reaction with bromine?

Answer 10

the bromine water would go from orange to colourless

Question 11

what type of reaction is alkenes reaction with bromine and why?

Answer 11

an addition reaction because there is only one product

Question 12

What can bromine water be a test for and why?

Answer 12

Bromine water can be a test for unsaturation

if you add bromine water to a substance and it stays orange, it is saturated, if it goes colourless, it is unsaturated.