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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. 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 ortho and para positions

NO₂ donate electrons at m-position

NO₂ makes the electron rich ring at ortho and para positions

NO₂ withdraws electrons at metaposition

2. Ketones react with G.R to produce

Carboxylic acid

3° alcohol

1° alcohol

2° alcohol

3. Rancidfication of fats and oils is due to

Both a and b

Hydrolysis reaction

Oxidation reaction

Hydrogenation reaction

4. The rate of E₁ reaction depends upon

The concentration of nucleophile

The concentration of substrate

None of these

The concentration of substrate as well as nucleophile

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

Frankland reaction

Cannizzaro’s reaction

Wurtz reaction

Carbylamine reaction

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

Organic acids

Metal ions

Non – metals

Organic bases

7. Iodine number of an oil indicates its

Acidic strength

Molecular weight

Purity

Degree of unsaturation

8. 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

9. In SN₁ mechanism the product has a configuration

50% inversion and 50% retention

Not inverted

100% inversion

May be inverted or not

10. 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

11. SN₂ reaction can be best carried out with

3° alkyl halide

All of these

2° alkyl halide

1° alkyl halide

12. The most reactive compound for electrophilic nitration will be

Nitrobenzene

Benzyl chloride

Benzoic acid

Chlorobenzene

13. Monohalo derivatives of alkanes are called

Imide

Alkyl halide

Alkenes

Amides

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

HCl + anhyd. ZnCl₂

SOCl₂

PCl₂

NaCl

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

A primary alcohol

A tertiary alcohol

A secondary alcohol

Methano

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

Formaldehyde

Carbon dioxide

Propanone

Acetaldehyde

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

Propane

Propanol

Propanoic acid

Ethanoic acid

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

Ethanol

Acetophenone

Benzophenone

Ethanal

19. Bond energy order of C-X bond is

C – Cl > C – Br > C – I > C – C

C – I > C – Br > C – CI > C – F

None of these

C – F > C – Cl > C – Br > C – l

20. Which one is least electronegative?

21. The fat soluble vitamins are

A and B

C and D

A and D

B and C

22. The chloroform reacts with NaOH to give

CH₃OH

CH₃COONa

HCOONa

Sodium oxalate

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

Chlorobenzene

Benzyl chloride

Chlorophenol

Chlorotoluene

24. DDT is formed from

Benzene and Chlorobenzene

Chlorobenzene and chlorine

Choral and Chlorobenzene

Chloral and Benzene

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

Methanal

Methanol

Phenol

Ethanol

Page 2 of 3

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

2 – 10

Many

100

Few

27. Reaction of ethylamine with chloroform in alcoholic KOH produces

C₂H₅NC

CH₃NC

C₂H₅CN

CH₃OH

28. SN² is a

Single step mechanism

Any one

Two step mechanism

Unimolecular

29. 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

Three carbon atoms

One or no carbon atom

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

A primary amine and chloroform

Chloroform and Ag powder

A mono alkyl amine and trichloro-methane

Any amin and chloroform

31. Halogens on treating with silver salts of acids give

Alkyl halide

Esters

Phenol

Alcohols

32. As ester is prepared by

Ketone and alcohol

Two alcohols

Carboxylic acid and alcohol

Aldehyde and alcohol

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

Phenol

Nitrobenzene

Aniline

Chlorobenzene

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

Butene

Propyne

Butane

Pentene

35. C – X bond is strong in:

CH₃Cl

CH₃F

CH₃Br

CH₃I

36. Methanol reaction with G.R to produce

2° alcohol

Carboxylic acid

3° alcohol

1° alcohol

37. Alkyl halides on treatment with metallic Na give

Alkenes

Alkynes

Aldehyde

38. The alkyl halide is converted into an alcohol by

Addition

Substitution

Elimination

Dehydrohalogenation

39. Aniline is a derivative of

Alkane

Aromatic hydrocarbon

Alicyclic

Alkene

40. SN₂ reaction is a

First order reaction

2nd order reaction

3rd order reaction

Any order

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

Williamson’s synthesis

Wurtz reaction

Hoffmans reaction

Clemensen reaction

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

1.4

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

4-Bromobenzyl cyanide

4-Bromo 2-cyanobenzyl chloride

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

44. Electrophile is

Electron donor

Proton donor

Electron rich

Electron deficient

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

E₁ and E₂

W₁ and E₂

E₂ and SN₂

E₁ and SN₁

46. A leaving group is a

May have positive or negative charge

Electrophile

Positively charged

Neucleophile

47. 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

Three alkanes

Only one

Four alkanes

48. Ethyl chloride on treatment with aqueous alkali gives

Ethanol

Ethane

Ethene

Ethanal

49. Benzene hexachloride is used as

Insecticide

Antimalerial drug

Antibiotic

Dye

50. Grignard reagent is reactive due to?

None of these

The polarity of C-Mg bond

The presence of Mg atom

The presence of halogen atom

Page 3 of 3

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

1, 2-Dichloroethane

Ethyl chloride

1, 1-Dichloroethane

Chloroacetic acid

52. Ethyl bromide reacts with sodium to produce

Butane

Ethyl sodium

Ethane

None of these

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

CHCl₃

CH₃CHO

(CH₃)₂O

CCl₃CHO

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

One

Two

Three

Four

55. In SN reaction the substrate is

Alkyl halide

Electrophite

An alcohol

Nucleophile

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

SN₂ mechanism

E₁ mechanism

SN₁ mechanism

None of these

57. 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

58. Keratomalacia is caused due to the deficiency of vitamin

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

Alkyl halide

Acid chloride

Acids

Benzene

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

CHCl₃

CCl₄

C₂H₆

C₂H₅Cl

61. Elimination bimolecular reaction involves

Second order kinetics

Third order kinetics

Zero order kinetics

First order kinetics

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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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