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ECAT Chemistry Alkyl Halides Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry Alkyl Halides MCQS Online Test

ECAT Chemistry Alkyl Halides Chapter Online Test

Total Questions:	61
Time Allowed:	30 Minutes
Total Marks:	61
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Alkyl Halides Test

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Chemistry

1. When ethyl iodide ad n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

Two alkanes

Only one

Three alkanes

Four alkanes

2. The rate of E₁ reaction depends upon

The concentration of nucleophile

None of these

The concentration of substrate as well as nucleophile

Concentration of substrate

3. Alkyl halides on treatment with metallic Na give

Aldehyde

Alkynes

Alkenes

Alkynes

4. Rate = K [Alkyl halide]¹ [nucleophile]¹ this is a rate expression for

E₁ mechanism

SN₁ mechanism

None of these

SN₂ mechanism

5. SN₂ reaction can be best carried out with

1° alkyl halide

3° alkyl halide

All of these

2° alkyl halide

6. In SN₁ mechanism the product has a configuration

Not inverted

50% inversion and 50% retention

May be inverted or not

100% inversion

7. What happens when CCl₄ is treated with AgNO₃ solution?

CCl₄ will dissolve in AgNO₃ solution

NO₂ will be evolved

Nothing will happen

A white ppt. of AgCl will form

8. C – X bond is strong in:

CH₃Br

CH₃F

CH₃I

CH₃Cl

9. Ketones react with G.R to produce

Carboxylic acid

2° alcohol

1° alcohol

3° alcohol

10. The optimum pH value for the enzymes “pepsin” is:

1.4

11. Grignard reagent is reactive due to?

None of these

The presence of halogen atom

The presence of Mg atom

The polarity of C-Mg bond

12. Electrophile is

Electron rich

Electron deficient

Electron donor

Proton donor

13. Which of the following does not give iodoform test?

Ethanal

Acetophenone

Benzophenone

Ethanol

14. Rancidfication of fats and oils is due to

Hydrogenation reaction

Both a and b

Hydrolysis reaction

Oxidation reaction

15. The chloroform reacts with NaOH to give

CH₃OH

Sodium oxalate

HCOONa

CH₃COONa

16. Aryl halides are less reactive towards nucleophile substitution reactions as compared to alkyl halides due to

Resonance stabilization

Larger carbon – halogen bond

The inductive effect

The formation of less stable carbonium ion

17. Halogens on treating with silver salts of acids give

Alkyl halide

Phenol

Alcohols

Esters

18. The reaction between primary amine, chloroform and alcoholic caustic potash is called

Cannizzaro’s reaction

Wurtz reaction

Carbylamine reaction

Frankland reaction

19. For which mechanism, the first step involved is the same

E₁ and SN₁

E₁ and E₂

E₂ and SN₂

W₁ and E₂

20. In SN reaction the substrate is

Nucleophile

Alkyl halide

An alcohol

Electrophite

21. Bond energy order of C-X bond is

C – Cl > C – Br > C – I > C – C

C – I > C – Br > C – CI > C – F

C – F > C – Cl > C – Br > C – l

None of these

22. Which of the following compounds on oxidation gives benzoic acid?

Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

23. Iodine number of an oil indicates its

Acidic strength

Molecular weight

Purity

Degree of unsaturation

24. Which one of the following molecules does not form alcohol when reacts with Grignard reagent?

Carbon dioxide

Propanone

Formaldehyde

Acetaldehyde

25. Which of the following reacts with chloroform and base to form phenyl isocyanide?

Nitrobenzene

Phenol

Chlorobenzene

Aniline

Page 2 of 3

26. Iodoethane reacts with sodium in ether, the product formed is

Pentene

Butane

Propyne

Butene

27. Ethyl bromide reacts with sodium to produce

None of these

Butane

Ethane

Ethyl sodium

28. The rate of E₁ reaction depends upon

The concentration of substrate

The concentration of nucleophile

None of these

The concentration of substrate as well as nucleophile

29. The alkyl halide is converted into an alcohol by

Addition

Substitution

Elimination

Dehydrohalogenation

30. In primary alkyl halides halogen atom is attached with that carbon which is further attached with how many carbons

Four

Two

One

Three

31. Ethyl chloride on treatment with aqueous alkali gives

Ethanal

Ethene

Ethane

Ethanol

32. The most reactive compound for electrophilic nitration will be

Chlorobenzene

Benzoic acid

Nitrobenzene

Benzyl chloride

33. Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

NO₂ withdraws electrons at metaposition

NO₂ withdraws electrons at ortho and para positions

NO₂ donate electrons at m-position

NO₂ makes the electron rich ring at ortho and para positions

34. For the carbylamine reaction we need hot alc. KOH and

A primary amine and chloroform

A mono alkyl amine and trichloro-methane

Chloroform and Ag powder

Any amin and chloroform

35. Coenzymes are the species which increases the activity of enzymes. They are chemically

Organic acids

Non – metals

Metal ions

Organic bases

36. The reaction of excess Grignard reagent with an ester of formic acid, HCO₂R, gives:

A primary alcohol

Methano

A tertiary alcohol

A secondary alcohol

37. Keratomalacia is caused due to the deficiency of vitamin

38. A leaving group is a

May have positive or negative charge

Electrophile

Positively charged

Neucleophile

39. Which of the following compounds gives trichloromethane on distilling with bleaching power?

Phenol

Methanal

Methanol

Ethanol

40. Cl₂ reacts with CS₂ in presence of AlCl₃ to form

C₂H₆

CCl₄

C₂H₅Cl

CHCl₃

41. The reaction of alcohol with SOCl₂ in the presence of pyridine as catalyst gives

Benzene

Alkyl halide

Acids

Acid chloride

42. Benzene hexachloride is used as

Insecticide

Antimalerial drug

Antibiotic

Dye

43. As ester is prepared by

Aldehyde and alcohol

Carboxylic acid and alcohol

Two alcohols

Ketone and alcohol

44. Which of the following with aqueous KOH will give acetaldehyde?

1, 1-Dichloroethane

Ethyl chloride

1, 2-Dichloroethane

Chloroacetic acid

45. When CO₂ is made to react with ethyl magnesium bromide followed by and hydrolysis the product formed is

Propanol

Propane

Ethanoic acid

Propanoic acid

46. A molecule of polysaccharide on hydrolysis produces __________ molecules of monosacharides

Few

Many

100

2 – 10

47. The final product formed by distilling ethyl alcohol with excess of Cl₂ and Ca(OH)₂ is

CCl₃CHO

CHCl₃

CH₃CHO

(CH₃)₂O

48. SN² is a

Any one

Single step mechanism

Two step mechanism

Unimolecular

49. Monohalo derivatives of alkanes are called

Alkenes

Imide

Alkyl halide

Amides

50. Which one is least electronegative?

Page 3 of 3

51. SN₂ reaction is a

3rd order reaction

First order reaction

Any order

2nd order reaction

52. In a primary alkyl halide, the halogen atom is attached to a carbon which is further attached to

Three carbon atoms

Only one carbon atom

One or no carbon atom

Two carbon atoms

53. The fat soluble vitamins are

B and C

C and D

A and B

A and D

54. Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?

NaCl

PCl₂

HCl + anhyd. ZnCl₂

SOCl₂

55. Elimination bimolecular reaction involves

Third order kinetics

Second order kinetics

Zero order kinetics

First order kinetics

56. Aniline is a derivative of

Alkene

Alkane

Alicyclic

Aromatic hydrocarbon

57. The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

4-Cyanobenzyle cyanide

4-Cyanobenzyl chloride

4-Bromo 2-cyanobenzyl chloride

4-Bromobenzyl cyanide

58. Methanol reaction with G.R to produce

3° alcohol

Carboxylic acid

2° alcohol

1° alcohol

59. Reaction of ethylamine with chloroform in alcoholic KOH produces

C₂H₅NC

CH₃NC

C₂H₅CN

CH₃OH

60. When alkyl halides are heated with aqueous solution of ammonia at about 100°C, amines are formed, This reaction is known as

Hoffmans reaction

Clemensen reaction

Wurtz reaction

Williamson’s synthesis

61. DDT is formed from

Chlorobenzene and chlorine

Chloral and Benzene

Benzene and Chlorobenzene

Choral and Chlorobenzene

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Mustansar KhanLast Updated: April 19, 2025

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ECAT Chemistry Alkyl Halides Test Online

Chemistry Alkyl Halides MCQS Online Test

ECAT Chemistry Alkyl Halides Chapter Online Test

ECAT Chemistry Alkyl Halides Test

Chemistry

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Chemistry Alkyl Halides MCQS Online Test

ECAT Chemistry Alkyl Halides Chapter Online Test

ECAT Chemistry Alkyl Halides Test

Chemistry

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