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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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Page 1 of 3

Chemistry

1. SN₂ reaction can be best carried out with

All of these

2° alkyl halide

3° alkyl halide

1° alkyl halide

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

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

4-Bromobenzyl cyanide

4-Cyanobenzyl chloride

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

Ethanal

Acetophenone

Ethanol

Benzophenone

4. The chloroform reacts with NaOH to give

Sodium oxalate

CH₃OH

CH₃COONa

HCOONa

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

1.4

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

Two carbon atoms

Three carbon atoms

Only one carbon atom

One or no carbon atom

7. C – X bond is strong in:

CH₃I

CH₃Br

CH₃F

CH₃Cl

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

A tertiary alcohol

A primary alcohol

A secondary alcohol

Methano

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

Three

Four

One

Two

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

Chlorotoluene

Chlorobenzene

Chlorophenol

Benzyl chloride

11. Ethyl chloride on treatment with aqueous alkali gives

Ethanal

Ethanol

Ethene

Ethane

12. Grignard reagent is reactive due to?

The presence of halogen atom

None of these

The presence of Mg atom

The polarity of C-Mg bond

13. SN² is a

Unimolecular

Any one

Single step mechanism

Two step mechanism

14. The alkyl halide is converted into an alcohol by

Substitution

Dehydrohalogenation

Addition

Elimination

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

E₁ and E₂

E₂ and SN₂

W₁ and E₂

E₁ and SN₁

16. Ketones react with G.R to produce

3° alcohol

Carboxylic acid

1° alcohol

2° alcohol

17. Halogens on treating with silver salts of acids give

Alkyl halide

Alcohols

Esters

Phenol

18. Which one is least electronegative?

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

Wurtz reaction

Williamson’s synthesis

Clemensen reaction

Hoffmans reaction

20. Monohalo derivatives of alkanes are called

Amides

Alkenes

Alkyl halide

Imide

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

CHCl₃

(CH₃)₂O

CH₃CHO

CCl₃CHO

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

Many

100

Few

2 – 10

23. The rate of E₁ reaction depends upon

The concentration of substrate

The concentration of substrate as well as nucleophile

None of these

The concentration of nucleophile

24. Rancidfication of fats and oils is due to

Both a and b

Oxidation reaction

Hydrogenation reaction

Hydrolysis reaction

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

A white ppt. of AgCl will form

CCl₄ will dissolve in AgNO₃ solution

Nothing will happen

NO₂ will be evolved

Page 2 of 3

26. The rate of E₁ reaction depends upon

Concentration of substrate

The concentration of nucleophile

None of these

The concentration of substrate as well as nucleophile

27. Benzene hexachloride is used as

Insecticide

Antibiotic

Antimalerial drug

Dye

28. DDT is formed from

Chloral and Benzene

Benzene and Chlorobenzene

Choral and Chlorobenzene

Chlorobenzene and chlorine

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

Metal ions

Non – metals

Organic acids

Organic bases

30. Elimination bimolecular reaction involves

Second order kinetics

First order kinetics

Zero order kinetics

Third order kinetics

31. Keratomalacia is caused due to the deficiency of vitamin

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

CCl₄

C₂H₅Cl

C₂H₆

CHCl₃

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

Methanal

Methanol

Ethanol

Phenol

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

Cannizzaro’s reaction

Carbylamine reaction

Frankland reaction

Wurtz reaction

35. SN₂ reaction is a

First order reaction

2nd order reaction

3rd order reaction

Any order

36. Aniline is a derivative of

Aromatic hydrocarbon

Alkane

Alkene

Alicyclic

37. The fat soluble vitamins are

C and D

A and D

B and C

A and B

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

The formation of less stable carbonium ion

Resonance stabilization

Larger carbon – halogen bond

The inductive effect

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

Aniline

Nitrobenzene

Phenol

Chlorobenzene

40. Reaction of ethylamine with chloroform in alcoholic KOH produces

CH₃OH

C₂H₅CN

C₂H₅NC

CH₃NC

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

Acetaldehyde

Propanone

Formaldehyde

Carbon dioxide

42. Electrophile is

Proton donor

Electron donor

Electron deficient

Electron rich

43. A leaving group is a

Neucleophile

Positively charged

Electrophile

May have positive or negative charge

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

1, 2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

45. 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 metaposition

NO₂ donate electrons at m-position

NO₂ withdraws electrons at ortho and para positions

46. 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

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

SOCl₂

PCl₂

NaCl

HCl + anhyd. ZnCl₂

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

Pentene

Propyne

Butane

Butene

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

SN₂ mechanism

None of these

SN₁ mechanism

E₁ mechanism

50. Methanol reaction with G.R to produce

1° alcohol

Carboxylic acid

3° alcohol

2° alcohol

Page 3 of 3

51. In SN₁ mechanism the product has a configuration

May be inverted or not

100% inversion

Not inverted

50% inversion and 50% retention

52. Iodine number of an oil indicates its

Molecular weight

Acidic strength

Purity

Degree of unsaturation

53. As ester is prepared by

Carboxylic acid and alcohol

Aldehyde and alcohol

Ketone and alcohol

Two alcohols

54. In SN reaction the substrate is

Alkyl halide

Electrophite

Nucleophile

An alcohol

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

Propane

Ethanoic acid

Propanol

Propanoic acid

56. The most reactive compound for electrophilic nitration will be

Chlorobenzene

Benzyl chloride

Nitrobenzene

Benzoic acid

57. Bond energy order of C-X bond is

None of these

C – I > C – Br > C – CI > C – F

C – Cl > C – Br > C – I > C – C

C – F > C – Cl > C – Br > C – l

58. Ethyl bromide reacts with sodium to produce

Ethyl sodium

None of these

Ethane

Butane

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

Benzene

Acid chloride

Acids

Alkyl halide

60. Alkyl halides on treatment with metallic Na give

Alkenes

Aldehyde

Alkynes

61. 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

Four alkanes

Three alkanes

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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

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