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

A secondary alcohol

A primary alcohol

A tertiary alcohol

Methano

2. SN₂ reaction is a

3rd order reaction

Any order

2nd order reaction

First order reaction

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

HCl + anhyd. ZnCl₂

PCl₂

NaCl

SOCl₂

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

Butane

Pentene

Butene

Propyne

5. Electrophile is

Electron rich

Electron donor

Proton donor

Electron deficient

6. Aniline is a derivative of

Alkane

Alicyclic

Aromatic hydrocarbon

Alkene

7. Ketones react with G.R to produce

Carboxylic acid

1° alcohol

2° alcohol

3° alcohol

8. Ethyl chloride on treatment with aqueous alkali gives

Ethane

Ethanol

Ethene

Ethanal

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

100

Few

Many

2 – 10

10. 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

Only one

Three alkanes

Two alkanes

Four alkanes

11. Benzene hexachloride is used as

Antimalerial drug

Insecticide

Antibiotic

Dye

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

One

Four

Two

Three

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

Any amin and chloroform

Chloroform and Ag powder

A mono alkyl amine and trichloro-methane

A primary amine and chloroform

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

W₁ and E₂

E₂ and SN₂

E₁ and SN₁

E₁ and E₂

15. Elimination bimolecular reaction involves

Second order kinetics

Third order kinetics

First order kinetics

Zero order kinetics

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

SN₁ mechanism

E₁ mechanism

None of these

SN₂ mechanism

17. As ester is prepared by

Aldehyde and alcohol

Carboxylic acid and alcohol

Ketone and alcohol

Two alcohols

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

Alkyl halide

Benzene

Acid chloride

Acids

19. 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

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

Nothing will happen

A white ppt. of AgCl will form

NO₂ will be evolved

CCl₄ will dissolve in AgNO₃ solution

21. Reaction of ethylamine with chloroform in alcoholic KOH produces

C₂H₅NC

CH₃OH

CH₃NC

C₂H₅CN

22. The fat soluble vitamins are

C and D

A and B

A and D

B and C

23. DDT is formed from

Benzene and Chlorobenzene

Choral and Chlorobenzene

Chlorobenzene and chlorine

Chloral and Benzene

24. Which one is least electronegative?

25. In SN₁ mechanism the product has a configuration

100% inversion

Not inverted

50% inversion and 50% retention

May be inverted or not

Page 2 of 3

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

Benzyl chloride

Chlorophenol

Chlorobenzene

Chlorotoluene

27. The chloroform reacts with NaOH to give

CH₃OH

CH₃COONa

Sodium oxalate

HCOONa

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

4-Bromobenzyl cyanide

4-Cyanobenzyle cyanide

4-Cyanobenzyl chloride

4-Bromo 2-cyanobenzyl chloride

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

Ethanoic acid

Propane

Propanoic acid

Propanol

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

Larger carbon – halogen bond

The formation of less stable carbonium ion

The inductive effect

Resonance stabilization

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

Non – metals

Metal ions

Organic bases

Organic acids

32. Halogens on treating with silver salts of acids give

Esters

Alcohols

Alkyl halide

Phenol

33. Monohalo derivatives of alkanes are called

Alkyl halide

Alkenes

Imide

Amides

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

Ethanal

Benzophenone

Acetophenone

Ethanol

35. Ethyl bromide reacts with sodium to produce

None of these

Butane

Ethyl sodium

Ethane

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

Ethyl chloride

Chloroacetic acid

1, 1-Dichloroethane

1, 2-Dichloroethane

37. The most reactive compound for electrophilic nitration will be

Chlorobenzene

Nitrobenzene

Benzyl chloride

Benzoic acid

38. Rancidfication of fats and oils is due to

Both a and b

Hydrolysis reaction

Oxidation reaction

Hydrogenation reaction

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

Clemensen reaction

Williamson’s synthesis

Wurtz reaction

40. 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

41. Iodine number of an oil indicates its

Molecular weight

Acidic strength

Degree of unsaturation

Purity

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

CH₃CHO

CCl₃CHO

(CH₃)₂O

CHCl₃

43. Methanol reaction with G.R to produce

Carboxylic acid

3° alcohol

1° alcohol

2° alcohol

44. SN₂ reaction can be best carried out with

2° alkyl halide

3° alkyl halide

1° alkyl halide

All of these

45. The rate of E₁ reaction depends upon

The concentration of substrate as well as nucleophile

The concentration of nucleophile

None of these

The concentration of substrate

46. In SN reaction the substrate is

An alcohol

Electrophite

Nucleophile

Alkyl halide

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

C₂H₅Cl

CHCl₃

C₂H₆

CCl₄

48. SN² is a

Unimolecular

Two step mechanism

Single step mechanism

Any one

49. C – X bond is strong in:

CH₃Cl

CH₃F

CH₃I

CH₃Br

50. Keratomalacia is caused due to the deficiency of vitamin

Page 3 of 3

51. The rate of E₁ reaction depends upon

Concentration of substrate

The concentration of substrate as well as nucleophile

None of these

The concentration of nucleophile

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

1.4

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

Aniline

Chlorobenzene

Phenol

Nitrobenzene

54. Alkyl halides on treatment with metallic Na give

Alkynes

Aldehyde

Alkenes

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

Methanol

Methanal

Ethanol

Phenol

56. The alkyl halide is converted into an alcohol by

Addition

Dehydrohalogenation

Substitution

Elimination

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

Frankland reaction

Cannizzaro’s reaction

Carbylamine reaction

Wurtz reaction

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

Propanone

Acetaldehyde

Carbon dioxide

Formaldehyde

59. Grignard reagent is reactive due to?

The presence of halogen atom

None of these

The polarity of C-Mg bond

The presence of Mg atom

60. A leaving group is a

Positively charged

Electrophile

Neucleophile

May have positive or negative charge

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

Two carbon atoms

Three carbon atoms

One or no carbon atom

Only one carbon atom

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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

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