Haloalkanes & Haloarenes

Question 1

Name C(CH3)3 - CH2

Answer 1

Neopentyl

Question 2

Iodobutane from butanol

Answer 2

HI

Question 3

Iodobutane from chlorobutane

Answer 3

NaI

Question 4

Iodobutane from butene

Answer 4

HBr(pero) + KI

Question 5

Use of ch2cl2

Answer 5

Paint remover, propellant in aerosols, solvent in manufacturing, metal cleaning, harms nervous system, impairs hearing & vision, cause dizziness, nausea, burning of skin, burn the cornea

Question 6

Chcl3

Answer 6

Solvent for fats, for production of freon refrigerant, general anesthetic in surgery, depresses nervous system, dizziness, fatigue, headache, damage liver(carbonyl chloride known as phosgene) & kidneys

Question 7

ChI3

Answer 7

Antiseptic, due to smell, I has been replaced by other substances of iodine

Question 8

Ccl4

Answer 8

Manufacture of refrigeratants, propellants for aerosols, feedstock in the synthesis of coconut, cleaning fluid, spot remover, fire extinguisher, dizziness, nausea, damage to nerve cells, lead to coma, death, irregular heart beat, liver cancer, depletes ozone layer, disruption of immune system

Question 9

Freons

Answer 9

Cfc of methane & ethane are freons, stable, non toxic, non corrosive, liquifiable gas, propellants, ac purposes, upset ozone balance

Question 10

Ddt

Answer 10

Insecticide, effect against malaria & lice that carry typhus, high toxicity to fish, stored in fatty tissues

Question 11

Ethanol to butyne

Answer 11

Socl2 + Ch≡CNa

Question 12

Propene to nitropropane

Answer 12

Hbr(pero) + AgNO2

Question 13

Toluene to benzyl alcohol

Answer 13

Cl2(boil) + aq. KOH

Question 14

Propane to propyne

Answer 14

Br2 + alc KOH

Question 15

Ethanol to fluroethane

Answer 15

SoCl2 + Hg2F2

Question 16

Bromomethane to propanone

Answer 16

Alc. KCN + ch3MgOHBr

Question 17

Butene to but2ene

Answer 17

HBr + alc KOH

Question 18

Benzene to biphenyl

Answer 18

Br2/Febr3 + 2Na(dry ether)

Question 19

Ethanol to butyne

Answer 19

So2Cl2 + Ch≡CNa

Question 20

Benzene to 4bromonitrobenzene

Answer 20

Br2/Febr3 + HNO3/H2SO4

Question 21

Benzyl alc to 2phenyl ethanoic acid

Answer 21

PCl5 + KCN + 2H2O/H+

Question 22

Ethanol to propane nitrile

Answer 22

Red P/I2 + KCN

Question 23

Aniline to chlorobenzene

Answer 23

Diazotisation + CuCl/HCl

Question 24

2methylpropene to 2chloro2methylpropane

Answer 24

HCl

Question 25

Ethylchloride to propanoic acid

Answer 25

KCN + 2H2O/H+

Question 26

Butene to butyliodide

Answer 26

HBr + NaI

Question 27

2chloropropane to propanol

Answer 27

Alc KOH + HBr(pero) + aq KOH

Question 28

Wurtz reaction follows

Answer 28

SN2 mechanism

Question 29

The treatment of alkyl chloride with aq. KOH leads to the formation of alcohols but in the presence of alc. KOH alkenes are major products?

Answer 29

Aq. KOH dissociated into ions, act as strong nucleophiles & produce alcohols. Since hydration of OH ion takes place, they’re not able to abstract H from B-atom
In alc. KOH, ethoxide ion being a strong base, abstract H from B-atom forming alkenes

Question 30

Why does preparation of aryl iodide require presence of an oxidizing agent?

Answer 30

Rns are reversible

Question 31

Test to detect prescence of double bond

Answer 31

Bromine water test with CCl4 produce reddish brown color of bromine in alkenes

Question 32

How can you obtain iodoethane from ethanol with only NaI?

Answer 32

Heat it with NaI in 95% H3PO4

Question 33

Enhance reactivity of aryl halides?

Answer 33

E withdrawing groups