alkenes

Question 1

conditions for alcohol → alkene

Answer 1

excess conc H2SO4, 170°C

Question 2

halogenoalkane → alkene

Answer 2

ethanolic NaOH, heat

Question 3

mild oxidation (alkene → diol)

Answer 3

cold KMnO4 (aq), H2SO4 (aq)

Question 4

strong oxidation (alkene → ketone/carboxylic acid)

Answer 4

KMnO4 (aq), H2SO4 (aq), heat

Question 5

reduction (alkene → alkane)

Answer 5

H2, Ni, heat
or
H2, Pt

Question 6

alkene → dihalogenoalkane

Answer 6

Br2 in CCl4 in the dark
or
Br2 (l) in the dark

Question 7

alkene → alcohol

Answer 7

1. conc H2SO4, 0°C
2. boiling H20

Question 8

alkene → halogenoalkane

Answer 8

HCl/HBr (g)

Question 9

how do alkyl groups affect the stability of a carbocation

Answer 9

alkyl groups:
- electron donating
- disperses the +ve charge of the carbocation
- making carbocation more stable