Aromaic hdro carbon

Question 1

Hydrocarbon derived from ……..

Answer 1

fatty acids

Question 2

which compound has high ratio of hydrogen

Answer 2

aliphatic hydrocarbon ( fatty )

Question 3

aromatic compounds produced from some ………. and ………

having characeristic ………

Answer 3

1. resins
2. natural product
3. odor

Question 4

what is the parent compound in hydrocarbon

Answer 4

methane

Question 5

what is the compounds tha has less number of hydrogen

Answer 5

aromatic compounds

Question 6

what is the first member in aromatic compound

Question 7

draw benzene ring

Question 8

what is the compound that has

2 benezene ring

3 benezene ring

Answer 8

1. Naphthalene
2. Anthracene

Question 9

compare between benzine and benezene

Answer 9

benzine

1. Aliphatic
2. staurated
3. extracted from petrol
4. use in dry clean

benzene

1. Aromaic
2. unstaurated
3. extracted from coal
4. car fuel

Question 10

identifiction of the structural formula of benezene took several years

Answer 10

1. because it react by addition and by substitution
2. , and the bond length between the carbon atoms are intermediate between the length of single bond and double bond
3. in addition of other properties

which made the scientists confused foe long time

Question 11

who discovered hexagonal cyclic shape and called …….

Answer 11

1. german scienis kekule
2. kekule formula

Question 12

tell me about keklue fourmla

Question 13

tell me all ways to preapre benzene

Answer 13

1. from fractional distillation of light oil of cool tar at 80 -82^o C
2. from aliphatic petroleum derivatives
3. from phenol
4. Dry distlliation of sodium benzoate with soda lime

Question 14

how to preapre benzene from cool tar

Answer 14

cool →destructive distilation → coal tar

coal tar →fractional distillation at 80:82^o C → benzene ring

Question 15

what is meant by destructive distllation

Answer 15

strong hrating absbsent of air

Question 16

prpration from petroleum derivative gives two method

tell me about them and how to prepare benzene from them

Answer 16

1. from normal hexane ( catltic reforming ) CH₃ + CH₂ + CH₂ + CH₂ + CH₂ +CH_3(l)→ H , platnium → benzene ring_(l) + 4H_2(g)
2. ​​​polymerization of acetylene ( cyclic polmrization or trimerization ) 3CH=_ CH_(g) →red hot nickel tupe → benezene ring_(l)

Question 17

what is the limit of catalytic reforming

and if we increase of these limit what it is will happen to the last compound

if ther is a branch in the limit combound

Answer 17

1. 1 ; 6 ( hexane)
2. any combound be a branch
3. any branch be branch

Question 18

what is phenol and the moluculer formula

Answer 18

it is an benzene ring less one H has hydrooxide

C₆H₅–OH

Question 19

how to obtain benezene from phenol

Answer 19

phenol_(S) + Zn_(S) →H\reduction→ benzene + ZnO

Question 20

zinc is ……….. agent

Answer 20

reducing

Question 21

how to obtain benzene from benzenoic acid

Answer 21

1. C₆H₅–COOH + NaOH →→ C₆H₅ – COONa + H₂O
2. C₆H₅ – COONa + NaOH →H \ CaO→ C₆H₆ + Na₂CO₃

Question 22

how to name benzene mono - substituted benzene

Answer 22

is derived from the name of the atom or the group which is attached to benzene ring followed by the word benzene

Question 23

what is the moluculer formula of toluene

Answer 23

C₆H₅ – CH₃

Question 24

the entering atom or the group attacks any carbon atom of benzene

Answer 24

because the six carbon atoms in benzene ringt are identical

Question 25

what the phenyl

Answer 25

it is benzene by removing one hydrogen atom

C₆H₅₊₊₊₊

Question 26

what is the difference between NaPHtalene and diphenyl

Question 27

the name of disubstituted benzene may be represented by

Answer 27

three isomers which are

ortho O-

meta M-

para P-

Question 28

how to name disubstitute benzene

Answer 28

the main compound direct the new compound to ortho and para postion and other direct to meta position

Question 29

tell me the two type of direct group

Answer 29

if the main compound is

Alkyl (-R) , hydroxyl (-OH) , halogen . amino group (NH2)

to ortho . para pothtion

OR

aldehydic (–CHO) ketonic (C=O) ,carboxylic (–COOH)

Nitro (NO2) to meta postion

Question 30

give me example of two type of chlorination of two type direct group

Answer 30

page 39

Question 31

chlorination of toluene gives two products while chlorination Nitro benzene gives on product

Answer 31

because methyl radicel direct to ortho and para posation while nitro group direct to meta postion

Question 32

it is imposiple to use ………… in name trisubstituted benzene but use………………

Answer 32

expression ortho meta and para

IUPAC

Question 33

the carbon atoms in the ring take a numbers where each carbon atom attached to a group or atom takes the same number`

Question 34

the name about trisubstituted benzene arranged accordin to……….

Answer 34

alphabetic letter

Question 35

the physical properties of benzene is

Answer 35

1. A transparent color less liquid of pleasant smell
2. immisible with water , but miscible with organic solvent
3. itis denistey less than that water
4. boling point of benzene 80^oC

Question 36

the chemical properties if benzene

Answer 36

1. it burn in air with black smoky flame this mean that its molecule contains a large number of carbon atom
2. benzene react by two kinds of chemical reactions ( addition and substitution )

Question 37

addtion reaction take place by two type of reaction tell me about them

Answer 37

1. hydrogenation
2. halgonation in direct sun light

Question 38

hydronation prodused

Answer 38

benzene_(L) + 3H_2(g) →H+preacure \ cat→cyclohexane

Question 39

halgonation prodused by addtion

Answer 39

benzene + 3Cl₂ →UV→C₆H₆Cl₆

NOTE ANY HALGOEN 3ADY

Question 40

tell the name and use of C₆H₆Cl₆

Answer 40

1. Hexa chlorocyclo hexane or gamixane
2. insectcide مبيدات حشرية

Question 41

halogenation in direct sun light by substition ( CL2 )

Answer 41

benzene + Cl₂ →FeCl₃→ benzene-Cl + HCl

Question 42

DDT tell me the name and starctural fourmla

Answer 42

CL–benzene–CH^CCL₃ – benzene –Cl

Dichloro diphenyl or trichloro ethane

Question 43

DDT used as insect side

Answer 43

due to the presence of group (=CH–CCl₃ ) which dissolves in the fatty tissue of the insect and kill it

Question 44

DDT was called the ugly compound

Answer 44

because it stable compound remains in enviroment without decaying killing useful insect as the bees , besides it goes with the rains to the rivers and lakes and kills fish and the aquatic creatures it drains to the food chain until reached the man

Question 45

DDT was prevented in many developed countries GR

Answer 45

because it stable compound remains in enviroment without decaying killing useful insect as the bees , besides it goes with the rains to the rivers and lakes and kills fish and the aquatic creatures it drains to the food chain until reached the man

Question 46

NItration by substition

Answer 46

benzene + HNO₃ →50C\ conc \H₂SO₄→ Nitro benzene + H₂O

Question 47

TNT is one of the ……… Nitro organic compound which was produced by millions of tons through the ………..world war and still ………….

Answer 47

1. explosive
2. second
3. produced until now

Question 48

TNT is prepared by raction between ………. and ………………………. with ……………ratio

Answer 48

1. toluene
2. mixture of conc Nitric and sulphuric acids
3. 1:1

Question 49

how to preapre TNT

Answer 49

toluene + HNO₃ →conc H₂SO₄→ TNT

Question 50

TNT اختصار

Answer 50

tri nitro touluene

Question 51

NItro organic combound burn rabdily and a great amount of heat and gases are produced accompanied by explotion

Answer 51

because their molecules contain their own fuel , which is carbon beside oxygen this is the oxidizing agent and due to the weak bond between N and O to form the two strong bonds between C and O in carbon dioxide and the bond between N=_ N in nitroge3n molecule