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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

Page 1 of 3

Chemistry

1. Which one is least electronegative?

2. 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

Four alkanes

Only one

Two alkanes

Three alkanes

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

1.4

4. Ethyl chloride on treatment with aqueous alkali gives

Ethene

Ethane

Ethanol

Ethanal

5. C – X bond is strong in:

CH₃Cl

CH₃I

CH₃F

CH₃Br

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

Many

100

2 – 10

Few

7. Monohalo derivatives of alkanes are called

Imide

Alkenes

Amides

Alkyl halide

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

A secondary alcohol

A tertiary alcohol

Methano

A primary alcohol

9. In SN₁ mechanism the product has a configuration

100% inversion

May be inverted or not

Not inverted

50% inversion and 50% retention

10. SN₂ reaction is a

Any order

3rd order reaction

2nd order reaction

First order reaction

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

Chloroform and Ag powder

A mono alkyl amine and trichloro-methane

A primary amine and chloroform

Any amin and chloroform

12. A leaving group is a

May have positive or negative charge

Electrophile

Positively charged

Neucleophile

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

The inductive effect

Larger carbon – halogen bond

The formation of less stable carbonium ion

Resonance stabilization

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

SN₁ mechanism

SN₂ mechanism

None of these

E₁ mechanism

15. DDT is formed from

Chloral and Benzene

Choral and Chlorobenzene

Benzene and Chlorobenzene

Chlorobenzene and chlorine

16. The alkyl halide is converted into an alcohol by

Dehydrohalogenation

Elimination

Substitution

Addition

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

CHCl₃

CCl₄

C₂H₆

C₂H₅Cl

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

NO₂ will be evolved

A white ppt. of AgCl will form

CCl₄ will dissolve in AgNO₃ solution

Nothing will happen

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

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

4-Bromobenzyl cyanide

20. Electrophile is

Proton donor

Electron rich

Electron donor

Electron deficient

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

Phenol

Chlorobenzene

Aniline

Nitrobenzene

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

1, 2-Dichloroethane

Chloroacetic acid

Ethyl chloride

1, 1-Dichloroethane

23. Grignard reagent is reactive due to?

The polarity of C-Mg bond

None of these

The presence of halogen atom

The presence of Mg atom

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

Four

One

Three

Two

25. The fat soluble vitamins are

A and B

A and D

B and C

C and D

Page 2 of 3

26. SN² is a

Any one

Single step mechanism

Unimolecular

Two step mechanism

27. Keratomalacia is caused due to the deficiency of vitamin

28. The most reactive compound for electrophilic nitration will be

Chlorobenzene

Benzyl chloride

Nitrobenzene

Benzoic acid

29. The rate of E₁ reaction depends upon

None of these

The concentration of substrate as well as nucleophile

Concentration of substrate

The concentration of nucleophile

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

Ethanoic acid

Propanol

Propane

Propanoic acid

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

E₁ and SN₁

E₂ and SN₂

E₁ and E₂

W₁ and E₂

32. As ester is prepared by

Carboxylic acid and alcohol

Ketone and alcohol

Two alcohols

Aldehyde and alcohol

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

CHCl₃

CH₃CHO

(CH₃)₂O

CCl₃CHO

34. The chloroform reacts with NaOH to give

HCOONa

CH₃OH

CH₃COONa

Sodium oxalate

35. Rancidfication of fats and oils is due to

Oxidation reaction

Hydrogenation reaction

Both a and b

Hydrolysis reaction

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

Formaldehyde

Propanone

Carbon dioxide

Acetaldehyde

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

Only one carbon atom

Two carbon atoms

One or no carbon atom

Three carbon atoms

38. The rate of E₁ reaction depends upon

The concentration of substrate

None of these

The concentration of nucleophile

The concentration of substrate as well as nucleophile

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

Hoffmans reaction

Williamson’s synthesis

Wurtz reaction

Clemensen reaction

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

Ethanol

Methanal

Phenol

Methanol

41. Iodine number of an oil indicates its

Purity

Acidic strength

Degree of unsaturation

Molecular weight

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

Wurtz reaction

Frankland reaction

Carbylamine reaction

Cannizzaro’s reaction

43. Halogens on treating with silver salts of acids give

Phenol

Alkyl halide

Alcohols

Esters

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

Non – metals

Organic acids

Organic bases

Metal ions

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

Propyne

Butane

Butene

Pentene

46. Reaction of ethylamine with chloroform in alcoholic KOH produces

CH₃NC

C₂H₅CN

C₂H₅NC

CH₃OH

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

NO₂ makes the electron rich ring at ortho and para positions

NO₂ withdraws electrons at ortho and para positions

NO₂ withdraws electrons at metaposition

NO₂ donate electrons at m-position

48. Ethyl bromide reacts with sodium to produce

Butane

Ethyl sodium

None of these

Ethane

49. Bond energy order of C-X bond is

C – Cl > C – Br > C – I > C – C

C – F > C – Cl > C – Br > C – l

None of these

C – I > C – Br > C – CI > C – F

50. In SN reaction the substrate is

An alcohol

Alkyl halide

Nucleophile

Electrophite

Page 3 of 3

51. Elimination bimolecular reaction involves

Zero order kinetics

Third order kinetics

Second order kinetics

First order kinetics

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

Acetophenone

Ethanol

Ethanal

Benzophenone

53. Benzene hexachloride is used as

Antibiotic

Dye

Antimalerial drug

Insecticide

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

Benzyl chloride

Chlorophenol

Chlorotoluene

Chlorobenzene

55. SN₂ reaction can be best carried out with

All of these

2° alkyl halide

1° alkyl halide

3° alkyl halide

56. Methanol reaction with G.R to produce

Carboxylic acid

1° alcohol

2° alcohol

3° alcohol

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

PCl₂

SOCl₂

NaCl

HCl + anhyd. ZnCl₂

58. Aniline is a derivative of

Alicyclic

Aromatic hydrocarbon

Alkane

Alkene

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

Acid chloride

Alkyl halide

Acids

Benzene

60. Ketones react with G.R to produce

2° alcohol

1° alcohol

3° alcohol

Carboxylic acid

61. Alkyl halides on treatment with metallic Na give

Aldehyde

Alkynes

Alkenes

Alkynes

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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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