Alkenes

Question 1

When do alkenes combust completely and what is the product of complete combustion?

Answer 1

Plenty of O2. Product is H2O and CO2

Question 2

When do alkenes combust incompletely and what is the product of incomplete combustion?

Answer 2

Not enough oxygen. Product is H2O, CO2 AND ALSO Carbon and CO

Question 3

What is the flame when alkenes completely combust?

Answer 3

Smoky

Question 4

What is the flame when alkenes incompletely combust?

Answer 4

smoky yellow flame and less energy

Question 5

How do alkenes react with other compounds?

Answer 5

They react via addition reactions

Question 6

Reaction of Alkenes with with hydrogen

Answer 6

Addition atoms across the carbon-carbon double bond so that the double bond
becomes a single carbon-carbon bond.
a) With hydrogen - hydrogenation; requires a higher temperature and a nickel
catalyst

Question 7

Reaction of Alkenes with with steam

Answer 7

b) With - hydration; requires high temperature, pressure, and
concentrated phosphoric acid (H3PO4) as a catalyst

Question 8

Reaction of Alkenes with with halogens

Answer 8

c) With Br2/Cl2/I2 - addition of halogens