4d

Question 1

Alkene functional group

Answer 1

C = C

Question 2

Alkene general formula

Answer 2

CnH2n

Question 3

Why are alkenes unsaturated

Answer 3

More atoms can be added (they contain a double bond)

Question 4

Alkenes with bromine

Answer 4

Double bond is broken and Br2 is added.

e.g.

C2H4 + Br2 –>C2H4Br2

Question 5

Test for alkene

Answer 5

Bromine water(orange) will turn colourless if it is an alkene. Will stay orange if it is an alkane.