alkene

Question 1

these combound has at least …… bond betweent two carbon atoms on of of them called …….bond strong and diffeclt to broken as in saturated hydro carbon while other called …. bond which is weacker

Answer 1

douple bond

sigma bond

pi bond

Question 2

which combounds more actaive alkane or alkene andf GR

Answer 2

alakene

dueto precence of pi bond

Question 3

alkene can considerd as a dervatives of alkane by removing ….. hydrogen bond and the suffix ane change by sufix ……. or ……

Answer 3

two

ene

ylene

Question 4

الترقيم

Answer 4

1. douple bond من الناحية الاقرب
2. Branch من الناحية الاقرب لل
3. من الناحية الاكثر ازدححما
4. arrange alph من ناحية

Question 5

prepration of ethylene in a lap draw and eqution and the machanism of the reaction

Answer 5

page 23

Question 6

how to prepare alkene from alcohol combounds

Answer 6

alcohol → H₂SO₄ \ 180^o dehydration → alkene + H₂O

CH₃ - CH₂ - OH → H₂SO₄ \ 180^o dehydration → CH₂ = CH₂ + H₂O

Question 7

how much memeber are gases at normal tempreture

Answer 7

the firct four memeber

NOTE ; NO alkene has one carbon

Question 8

alkenes whicj contain from C₅ to C₁₅ carbon are

Answer 8

liquids

Question 9

the combounds which contain more than 15 carbon are

Answer 9

soilds

Question 10

alkenes are ………. and …….. but the can dissolve in organic solvents such as

Answer 10

non polar

insoulble in water

benzene and carbon tetra chloride

Question 11

alkene can be used as a fuel GR

Answer 11

because alkenes burn in the air vthrough exothermic chemical reactions giving carbon dioxide and water vapor

C₂H_4g + 3O_2g →H→ 2H₂O _(V) + 2CO_{2 g} + heat

Question 12

what is bayers reactrion`

Answer 12

it is the reaction between ethene and potassium permaangante in alkaline medium

CH₂ - CH₂ + H2O + (O) → KMNO4 alkaline → CH2 OH - CH2 OH

Question 13

what is thbe name of these combound CH2 OH - CH2 OH

Answer 13

ethylene glycol

Question 14

what is the important of the bayers reaction

Answer 14

1. preparation of ethylene glycol used as antifreezing substance in car readiatore in cold region
2. detection of unsaturation

Question 15

bayers reaction used in detect the unsturated bond GR

Answer 15

beacuse the viloet ray of KMNO₄ disappears