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Halo alkanes and halo arenes

Total questions: 86

Worksheet time: 53mins

Name
Class
Date
1.

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

a)

Electrophilic elimination reaction

b)

Electrophilic substitution reaction

c)

Free radical addition reaction

d)

Nucleophilic substitution reaction

2.

Which of the following is an example of vic-dihalide?

a)

Dichloromethane

b)

1,2-dichloroethane

c)

Ethylidene chloride

d)

Allyl chloride

3.

The position of –Br in the compound in CH3CH=CHC(Br)(CH3)2 can be classified as ____________.

a)

Allyl

b)

Aryl

c)

Vinyl

d)

Secondary

4.

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction?

a)

Cl–

b)

Cl+

c)

AlCl3

d)

[AlCl4]–

5.

Ethylidene chloride is a/an ______________.

a)

vic-dihalide

b)

gem-dihalide

c)

allylic halide

d)

vinylic halide

6.

A primary alkyl halide would prefer to undergo _____________.

a)

SN1 reaction

b)

SN2 reaction

c)

α–Elimination

d)

Racemisation

7.

Which of the following alkyl halides will undergo SN1 reaction most readily?

a)

(CH3)3C—F

b)

(CH3)3C—Cl

c)

(CH3)3C—Br

d)

(CH3)3C—I

8.

Which is the correct IUPAC name for CH3-CH(C2H5) -CH2-Br?

a)

1-Bromo-2-ethylpropane

b)

1-Bromo-2-ethyl-2-methylethane

c)

1-Bromo-2-methylbutane

d)

2-Methyl-1-bromobutane

9.

What should be the correct IUPAC name for diethylbromomethane?

a)

1-Bromo-1,1-diethylmethane

b)

3-Bromopentane

c)

1-Bromo-1-ethylpropane

d)

1-Bromopentane

10.

Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane

a)

Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

b)

1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

c)

Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

d)

Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane

11.

Which is the correct increasing order of boiling points of the following compounds?

1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene

a)

Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane

b)

Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane

c)

1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene

d)

1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

12.

Arrange the above compounds in the increasing order of their densities

a)

(a) < (b) < (c) < (d)

b)

(a) < (c) < (d) < (b)

c)

(d) < (c) < (b) < (a)

d)

(b) < (d) < (c) < (a)

13.

In which of the above molecules carbon atom marked with asterisk (*) is asymmetric?

a)

(a), (b), (c), (d)

b)

(a), (b), (c)

c)

(b), (c), (d)

d)

(a), (c), (d)

14.

What is ‘A’ in the reaction?

a)
b)
c)
d)
15.

Which of the carbon atoms present in the molecule given below are asymmetric?

a)

a, b, c, d

b)

b, c

c)

a, d

d)

a, b, c

16.

Which of the statements are correct about above reaction?

a)

(a) and (e) both are nucleophiles.

b)

In (c) carbon atom is sp3 hybridised.

c)

In (c) carbon atom is sp2 hybridised.

d)

(a) and (e) both are electrophiles.

17.

Which of the following statements are correct about the reaction intermediate?.

a)

Intermediate (c) is unstable because in this carbon is attached to 5 atoms.

b)

Intermediate (c) is unstable because carbon atom is sp2 hybridised.

c)

Intermediate (c) is stable because carbon atom is sp2 hybridised

d)

Intermediate (c) is less stable than the reactant (b).

18.

Haloalkanes contain halogen atom (s) attached to the sp3 hybridised carbon atom of an alkyl group. Identify haloalkane from the following compounds.

a)

2-Bromopentane

b)

Vinyl chloride (chloroethene)

c)

2-chloroacetophenone

d)

Trichloromethane

19.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
20.

Alkanes molecules are held together by

a)

metallic bonds

b)

Van der Waals forces of attraction

c)

covalent bonds

d)

ionic bonds

21.

Which reagent will you use for the following reaction? CH3CH2CH2CH3 ⎯⎯→ CH3CH2CH2CH2Cl + CH3CH2CHClCH3

a)

Cl2/UV light

b)

NaCl + H2SO4

c)

Cl2 gas in dark

d)

Cl2 gas in the presence of iron in dark

22.

Alkyl halides are prepared from alcohols by treating with

a)

HCl + ZnCl2

b)

Red P + Br2

c)

H2SO4 + KI

d)

All the above

23.

Haloalkanes contain halogen atom (s) attached to the sp3 hybridised carbon atom of an alkyl group. Identify haloalkane from the following compounds.

a)

2-Bromopentane

b)

Vinyl chloride (chloroethene)

c)

2-chloroacetophenone

d)

Trichloromethane

24.

What is the functional group of alcohols?

a)

–NH2

b)

–COOH

c)

–CHO

d)

–OH

e)

–NO2

25.

What is the name of this product?

a)

1– propanol

b)

1– propene

c)

ethylene glycol

d)

3– propanol

e)

1,2,3 – propanetriol

26.

What is the name of compound given ?

a)

1,2,3–propanetriol

b)

1–propanol

c)

3–propanol

d)

ethylene glycol

27.

Phenols produce 2,4,6-trinitro phenol using following reagents

a)

Dil HNO3

b)

Con HNO3

c)

Con HNO3 + Con H2SO4

d)

Con H2SO4

28.

Benzene diazonium chloride on reaction with phenol in weakly basic medium gives azo dye (p-hydroxy azobenzene) is called:

a)

Dows Reaction.

b)

Coupling Reaction

c)

Diazotisation reaction

d)

Sandmeyer Reaction

29.

Phenol reacts with bromine in CS2 at low temperature to give

a)

m-bromophenol

b)

o-and p-bromophenol

c)

p-bromophenol

d)

2,4,6-tribromophenol

30.

When phenol is treated with excess bromine water it gives

a)

m-bromophenol

b)

o- and p-bromophenol

c)

2,4-dibromophenol

d)

2,4,6-tribromophenol

31.

Dehydration of alcohol is an example of

a)

addition reaction

b)

elimination reaction

c)

substitution reaction

d)

redox reaction

32.

Phenol is less acidic than

a)

Methanol

b)

p-methoxyphenol

c)

p-nitrophenol

d)

Ethanol

33.

The compound obtained by the reaction of ethene with diborane followed by hydrolysis with alkaline H2O2 is

a)

ethanol

b)

propanol

c)

methanol

d)

triethyl bromide

34.

Which of the following cannot be made by using Williamson Synthesis:

a)

(a) Methoxybenzene

b)

(b) Benzyl p-nitrophenyl ether

c)

(c) tert. butyl methyl ether

d)

(d) Ditert. butyl ether

35.

Dehydration of alcohol to ethers is catalysed by

a)

(a) cone. H2SO4 at 413 K

b)

(b) Hot NaOH

c)

(c) Hot HBr

d)

(d) Hot HNO3

36.

tert-Butyl methyl ether on heating with HI gives a mixture of

a)

(a) tert-Butyl alcohol and methyl iodide.

b)

(b) tert-Butyl iodide and methanol

c)

(c) Isobutylene and methyl iodide

d)

(d) Isobutylene and methanol.

37.

What is the formula of iso propyl alcohol?

a)
b)
c)
38.

Which one is used as antifreeze in car radiators?

a)

ethanol

b)

glycol

c)

Propanol

d)

glycerol

39.
The type of alcohol in alcoholic beverages is called
a)
fermentation
b)
detoxification
c)
ethanol
d)
vodka
40.

At least how many carbon atoms are found in a tertiary alcohol?

a)

1

b)

2

c)

3

d)

4

41.

When ethyl alcohol is oxidized by two degrees, which one of the following products results?

a)

Acetaldehyde

b)

Oxy-propane

c)

Acetic acid

d)

Dimethyl ether

e)

Dimethyl ketone

42.

For the above compound, which one of the following names cannot be used?

a)

2–methyl–2–butanol

b)

2–methyl–2–hydroxybutane

c)

Tertiary pentanol

d)

Dimethyl ethyl carbinol

e)

2-pentanol

43.

Ether molecules are polar, but do not form hydrogen bonds with other ether molecules because:

a)

Ether molecules are so reactive that they never have an opportunity to form hydrogen bonds

b)

The molecules are generally too large

c)

There are too many hydrogen atoms on the molecules to bond with just one oxygen atom

d)

Only binary compounds form hydrogen bonds.

e)

There is no hydrogen atom bonded to the oxygen.

44.

Ethers undergo cleavaged by acid. When ethoxy benzene is treated with hydrogen iodide (HI) and reflux, the product is/are:

a)

Phenol and ethyliodide

b)

Phenyliodide and ethanol

c)

Phenyliodide and ethyliodide

d)

Phenol and ethanol

e)

Benzyl alcohol and ethyliodide

45.

2-Methoxy propane reacts with phosphorus pentachloride to form

a)

Methanol and isopropyl alcohol

b)

Methanol and isopropyl chloride

c)

Methyl chloride and isopropyl alcohol

d)

Methyl chloride and isopropyl chloride

e)

Methyl chloride and n-propyl chloride

46.

a)
b)
c)
d)

All of these

47.

a)
b)
c)
d)
48.

a)
b)
c)
d)
49.

a)

1-methoxypropane

b)

2-methoxypropane

c)

3-methoxypropane

d)

All of the above

50.
a)
b)
c)
d)

HCHO

51.

The major product formed by the reaction:

a)

CH3.CHCH3.CH2OCH3

b)

CH3 CH (OCH3) CH2 CH3

c)
d)
52.

a)

Only symmetrical ethers

b)

Only unsymmetrical ethers

c)

Both types

d)

None of these

53.

Among the Alkenes which one produces tertiary butyl alcohol on acid hydration

a)

CH3CH2CH=CH2

b)

CH3CH=CHCH3

c)

(CH3)2C=CH2

d)

CH3CH=CH2

54.

Which of the following cannot be made by using Williamson synthesis

a)

Methoxybenzene

b)

Benzyl p-nitrophenyl ether

c)

tert-Butyl methyl ether

d)

Di-tert-butyl ether

55.

When phenol is treated with CHCl3 and NaOH the product formed is

a)

benzaldehyde

b)

salicylaldehyde

c)

benzoic acid

d)

salicylic acid

56.

CH3CH2OH can be converted into CH3CHO by

a)

catalytic hydrogenation

b)

treatment with LiAlH4

c)

treatment with pyridinium chlorochromate

d)

treatment with KMnO4

57.

An organic compound X on treatment with PCC in dichloromethane gives compound Y. Compound Y reacts with I2 and alkali to form triiodomethane. The compound X is

a)

CH3CH2OH

b)

CH3CHO

c)

CH3COCH3

d)

CH3COOH

58.

Hydroboration-oxidation reaction gives

a)

primary alcohol

b)

secondary alcohol

c)

tert- alcohol

d)

all the three

59.

the major product when phenol is treated with PCl5

a)

chlorobenzene

b)

triphenylphosphate

c)

o-chlorophenol

d)

p-chlorophenol

60.

Phenol is stronger acid than water and itself it is

a)

weakly acidic

b)

weakly basic

c)

alkali

d)

strong acid

61.

Phenols are more acidic than alcohols because

a)

Phenoxide ion is stablised by resonance

b)

Phenols are more soluble in polar solvents

c)

Phenoxide ion does not exhibit resonance

d)

Alcohols do not lose H atoms at all

62.

Select the true statement

a)

Phenol reacts with sodium hydroxide but not sodium carbonate

b)

Phenol reacts with sodium carbonate but not with sodium hydroxide

c)

Phenol reacts with neither sodium carbonate nor sodium carbonate

d)

Phenol reacts with both sodium hydroxide and sodium carbonate

63.

Which is the correct drawing of o-bromonitrobenzene?

a)
b)
c)
d)
64.

Which is the correct drawing of 1,3 -dibromo-2-nitrobenzene?

a)
b)
c)
d)
65.

What is the name of this compound?

a)

o-pheno

b)

m-phenol

c)

o-chlorophenol

d)

p-chlorophenol

e)

m-chlorophenol

66.

Phenol is stronger acid than water and itself it is

a)

weakly acidic

b)

weakly basic

c)

alkali

d)

strong acid

67.

Phenol is obtained by heating aqueous solution of which of the following?

a)

Aniline

b)

Benzene diazonium chloride

c)

Benzoic acid

d)

Benzyl alcohol

68.

Comparing, Phenol reacts readily then the benzene, so it is a

a)

nucleophile

b)

electrophile

c)

protophile

d)

both A and B

69.

Which of the above compound is more acidic in nature

a)

A

b)

B

c)

C

d)

D

70.

Phenols produce 2,4,6-trinitro phenol using following reagents

a)

Dil HNO3

b)

Con HNO3

c)

Con HNO3 + Con H2SO4

d)

Con H2SO4

71.

The correct acidic strength of the following

a)

A

b)

B

c)

C

d)

D

72.

Phenols are more acidic than alcohols because

a)

Phenoxide ion is stablised by resonance

b)

Phenols are more soluble in polar solvents

c)

Phenoxide ion does not exhibit resonance

d)

Alcohols do not lose H atoms at all

73.

Which of the following is obtained when the compound below is heated with acidified KMnO4?

a)
b)
c)
d)
74.

What is reagent D used in nitration reaction??

a)

KMnO4

b)

conc HNO3, Conc H2SO4

c)

conc HNO2, Conc H2SO4

d)

conc H2SO4

75.

What is reagent B?

a)

CH3CH2Br, AlBr3

b)

CH3Cl, AlCl3

c)

CH3CH2Cl, FeCl3

d)

CH3CH(CH3), AlCl3

76.

What is the product F?

a)
b)
c)
d)
77.

What is product G?

a)
b)
c)
d)
78.

Phenol is stronger acid than water and itself it is

a)

weakly acidic

b)

weakly basic

c)

alkali

d)

strong acid

79.

Arrange the compounds in the decreasing order of acidic character

a)

A

b)

B

c)

C

d)

D

80.

Phenols produce 2,4,6-trinitro phenol using following reagents

a)

Dil HNO3

b)

Con HNO3

c)

Con HNO3 + Con H2SO4

d)

Con H2SO4

81.
What is the molecular formula of Benzene?
a)
C6H12
b)
C6H6
c)
C6H10
d)
C8H8
82.

Select the true statement.

a)

Phenols contain an aromatic ring and an -OH group

b)

Phenols contain an aromatic ring, a carbon side chain, and an -OH group

c)

Phenols contain an -OH group directly bonded to an aromatic ring

d)

Phenols contain an -OH group and at least one halogen

83.

Select the true statement

a)

Phenol reacts with sodium hydroxide but not sodium carbonate

b)

Phenol reacts with sodium carbonate but not with sodium hydroxide

c)

Phenol reacts with neither sodium carbonate nor sodium carbonate

d)

Phenol reacts with both sodium hydroxide and sodium carbonate

84.

Select the true statement

a)

Phenol reacts with both sodium hydroxide and sodium carbonate but carboxylic acids react with neither

b)

Both phenols and carboxylic acids react with sodium carbonate

c)

Carboxylic acids react with sodium hydroxide and sodium carbonate but phenols react with neither

d)

Both phenols and carboxylic acids react with sodium hydroxide

85.

Select the true statement

a)

Phenol is less reactive than benzene because the-OH group donates electron density to the aromatic ring

b)

Phenol is less reactive than benzene because the -OH group removes electron density from the aromatic ring

c)

Phenol is more reactive than benzene because the -OH group removes electron density to the aromatic ring

d)

Phenol is more reactive than benzene because the -OH group donates electron density to the aromatic ring

86.

Select the true statement

a)

Phenol decolourises bromine water only in the presence of a halogen carrier catalyst

b)

Phenol has sufficient electron density in the aromatic ring to polarise bromine molecules

c)

Phenol reacts with dilute nitric acid to form a mixture of 3-nitrophenol and 3,5-dinitrophenol

d)

Phenol reacts with concentrated nitric acid to form 2-nitrophenol and 3-nitrophenol

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