Alkanes and Alkenes

Question 1

What hydrocarbons are they called?

Answer 1

saturated hydrocarbons because the have no spare bonds

Question 2

What don’t alkanes do?

Answer 2

turn bromine water colourless

Question 3

what are the first three alkanes?

Answer 3

methane
ethane
propane

Question 4

what is the formula for methane?

Answer 4

CH44

Question 5

What is the formula for ethane?

Answer 5

C2H6

Question 6

What is the formula for propane?

Answer 6

C3H8

Question 7

What are alkenes?

Answer 7

chains of carbon atoms with one or more double bonds.

Question 8

What are alkene hydrocarbons called?

Answer 8

unsaturated hydrocarbons because the have spare bonds.

Question 9

what do alkenes do?

Answer 9

decolourise bromine water, they then form bonds with bromine atoms

Question 10

why dont alkanes form polymers?

Answer 10

no spare bonds

Question 11

why do alkenes make polymers?

Answer 11

because they have spare bonds

Question 12

how do alkenes from polymers?

Answer 12

they form by opening their double bonds in a long chain.

Question 13

what are the first two alkenes?

Answer 13

ethene and propene

Question 14

what is the formula for propene?

Answer 14

C3H6

Question 15

What is the formula for ethene?

Answer 15

C2H4

Question 16

Notice the names;

Answer 16

meth- one carbon atom e.g CH4
eth- two carbon atoms e.g C2H6 and C2H4
prop- three carbon atoms e.g C3H8 C3H6

Question 17

What are alkanes?

Answer 17

chain of carbon atoms with single bonds between them