seperation of alkane by fractional distillation

Question 1

why are alkanes useful ?

Answer 1

used in fuels
starting materials for production of organic molecules including pharmaceuticals

Question 2

where do we find alkanes ?

Answer 2

crude oil

Question 3

how is crude oil formed ?

Answer 3

a fossil fuel formed underground from the remains of plants and animals over millions of years under heat and pressure.this converts chemical in remains into crude oil

Question 4

why id crude oil non renewable ?

Answer 4

using it at a faster rate then it can form

Question 5

what is crude oil made up off ?

Answer 5

mixture of straight and branched chain alkanes along with other chemicals like sulfur

Question 6

where is fractional distillation carried out ?

Answer 6

in tall fractionating column

Question 7

where is the fractionating column hottest?

Answer 7

at bottom

Question 8

what do bubble caps do ?

Answer 8

allow vapours to move upwards

Question 9

what is the first stage of fractional distillation ?

Answer 9

crude oil id heated so everything starts as gas ?

Question 10

what is the second stage of fractional distillation ?

Answer 10

crude oil vapours pass into furnace

Question 11

what happens when crude oil reaches a point cooler than boiling point ?

Answer 11

condenses into a liquid and pass out into collecting trays

Question 12

what does it seperate alkanes into ?

Answer 12

same length