Alkane Reactions

Question 1

hydrocarbons wherein all bonds around carbon atom are single bonds, that is, all the carbon are sp3 hybridized

Answer 1

alkane

Question 2

all the bonds are sigma bonds, the geometry is tetrahedral, and the angle between the bonds is 109.5o

what type of hybridized carbons

Answer 2

Sp3

Question 3

general formula for alkane, where n is any integer

Answer 3

CnH2n+2

Question 4

ethane number of C and H atoms

Answer 4

C- 2
H - 6

Question 5

alkanes are these thus the intermolecular force of attraction amongst the molecules is wander vaals and therefore the melting point and boiling point are relatively lower than other organic compounds of the same number of carbon atoms

Answer 5

nonpolar

Question 6

The number of carbons ____ both the melting point and boiling point

Answer 6

increase

Question 7

The increase of the length of the carbon chain _____ the surface area of molecules

Answer 7

increases

Question 8

as the branching increases the melting point and the boiling point ____

Answer 8

decreases

Question 9

most important sources of alkane

Answer 9

gas and petroleum

Question 10

process to obtain alkanes from natural sources

Answer 10

distillation

Question 11

set a systematic way of naming organic compounds (IUPAC)

Answer 11

Union of Pure and Applied Chemistry

Question 12

set a systematic way of naming organic compounds (IUPAC)

Answer 12

Union of Pure and Applied Chemistry

Question 13

identify the special branched constituents

Answer 13

grade yourself accordingly

Question 14

reaction of alkane with molecular oxygen, O2. In the presence of heat to produce carbon dioxide, CO2, and water, H2O. The general equation is written as:

Answer 14

combustion

Question 15

what will the alkane react with in a combustion reaction

Answer 15

oxygen

Question 16

product of combustion reaction

Answer 16

CO2 + H2O

Question 17

draw the products of alkanes in combustion reaction

Answer 17

grade yourself accordingly

Question 18

three possible reactions of alkanes

Answer 18

combustion
cracking
halogenation

Question 19

involves the breakdown of long chain alkanes to smaller chain alkanes with the use of high temperature or catalysts

Answer 19

cracking

Question 20

two types of cracking

Answer 20

thermal cracking
catalytic cracking

Question 21

carried out at a temperature of approximately 750oC and at a pressure of 70 atm

Answer 21

thermal cracking

Question 22

temperature and pressure of alkane cracking

Answer 22

750 degrees
70 atm

Question 23

Gives a mixture of products with a high proportion of hydrocarbons with carbon to carbon double bonds (alkenes)

Answer 23

thermal cracking

Question 24

uses a zeolite catalyst that allows cracking to take place at a lower temperature (500oC) and pressure

Answer 24

catalytic cracking

Question 25

chosen to give high percentages of hydrocarbons with between 5 and 10 carbon atoms

Answer 25

zeolites

Question 26

zeolites give high percentage of hydrocarbons between how many carbon atoms

Answer 26

5 to 10

Question 27

produces high proportions of branched alkanes and aromatic hydrocarbons such as benzene, which burn more evenly in car engines

Answer 27

catalytic cracking

Question 28

alkane will react with Cl2 or Br2 in the presence of UV light to produce alkyl halide

Answer 28

free radical halogenation of alkane

Question 29

form in the mechanism where alkyl halide were produced

Answer 29

free radicals

Question 30

For halogenation reaction, the carbon atom must have a hydrogen atom attached to it, therefore a ____ substituted C will not undergo halogenation.

Answer 30

quaternary

Question 31

three step of free radical halogenation

Answer 31

initiation propagation termination

Question 32

involves the formation of free radical when UV light reacts with the halogen, X2 (the halogen may be Cl2 or Br2)

Answer 32

initiation

Question 33

draw the initiation process of X2

Answer 33

check ppt for answer

Question 34

involves the reaction of one halogen free radial to alkane to produce alkyl free radical and HX.

Answer 34

propagation

Question 35

draw the propagation process

Answer 35

grade yourself accordingly

Question 36

when the halogen free radical and the alkyl free radical reacts with each other, the alkyl halide is formed

Answer 36

termination

Question 37

draw the termination process

Answer 37

grade yourself accordingly

Question 38

do the reaction with CH4

Answer 38

grade yourself accordingly

Question 39

read the major product formation of alkane

Answer 39

grade yourself

Question 40

initiation is what kind of reaction

Answer 40

endothermic

Question 41

radical recombination is what kind of reaction

Answer 41

always exothermic

Question 42

termination is what kind of reaction

Answer 42

always exothermic

Question 43

propagation X=Br what kind of reaction

Answer 43

endothermic

Question 44

X-Cl what kind of reaction

Answer 44

extohermic