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Untitled Quiz

Total questions: 72

Worksheet time: 36mins

Name
Class
Date
1.

1. Which alkyl halide has the highest reactivity for a particular alkyl group?

a)

R-F

b)

R-Cl

c)

R-I

d)

R-Br

2.

Write the order of increasing S1N reactivity for the following alkyl halides:

A) CH3-X

B) (CH3)2CH-X

C) (CH3)3C-X

D) (CH3)3C-CH2-X

a)

a) A>C>B>D

b)

b) C>A>B>D

c)

c) C>B>D>A

d)

d) D>C>B>A

3.

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

a)

Electrophilic elimination reaction

b)

Electrophilic substitution reaction

c)

Free radical addition reaction

d)

Nucleophilic substitution reaction

4.

. Which is the correct increasing order of boiling points of the following compounds?

a)

Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane

b)

Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane

c)

1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene

d)

1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

5.

Which reagent will you use for the following reaction?

CH3CH2CH2CH3 → CH3CH2CH2CH2Cl + CH3CH2CHClCH3

a)

Cl2 /UV light

b)

NaCl + H2SO4

c)

Cl2 gas in dark

d)

Cl2 gas in the presence of iron in dark

6.

3. Which of the following is not the method of preparation of alkyl halide?

a)

a) Darzen’s method

b)

b) Halogenation of alkene

c)

c) Addition of HX on alkenes

d)

d) Hydration of alkene

7.

Complete the following reaction
R-OH + PCl5  →\rightarrow  RCl + X + HCl
X is

a)

PCl3

b)

PCl5

c)

POCl3

d)

POBr3

8.

complete the following reaction
R-OH + X  →\rightarrow  RCl + SO2 + HCl

a)

SO2

b)

SOCl3

c)

SOCl2

d)

SOCl

9.

When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

a)

Ortho and meta

b)

Ortho and para

c)

Meta and para

d)

Ortho, meta and para

10.

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

a)

Ethyl chloride

b)

Isopropyl chloride

c)

Choro benzene

d)

Benzyl chloride

11.

Assertion: KCN reacts with methyl chloride to give methyl isocyanide.

Reason: CN- is an ambidentate nucleophile.

a)

A

b)

B

c)

C

d)

D

12.

In a SN1 reaction on chiral centres, there is

a)

100% retention

b)

100% inversion

c)

Racemization

d)

None

13.

Ambident nucleophile is

a)

CN

b)

H2O

c)

Cl

d)

NH2

14.

Haloalkane is a polar molecule that undergoes nucleophilic substitution through SN1 and SN2. Arrange the following haloalkanes in order of increasing rate of unimolecular nucleophilic substitution reaction:

I. 2-chloro-2-methylpropane

II. 2-chlorobutane

III. 1-chlorobutane

a)

I< II < III

b)

I< III < II

c)

III< I < II

d)

III< II < I

15.

Which of the following is a chiral molecule?

a)

CH2BrI

b)

CH3CBr2Cl

c)

(CH3)2CHCl

d)

CH3CHBrCH2CH3

16.

Assertion: Halogen acids react with alcohols to form haloalkanes.

Reason: Order of reactivity of halogen acids HCl>HBr>HI

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion.

c)

Assertion is true but reason is false.

d)

Assertion is false but reason is true.

17.

Assertion: Electron withdrawing groups in aryl halides increases the reactivity towards nucleophilic substitution.

Reason: 2, 4-Dinitrochlorobenzene is more reactive than chlorobenzene.

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion

c)

Assertion is true but reason is false

d)

Assertion is false but reason is true.

18.

Assertion (A): Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.

Reason (R): Phosphorus chlorides give pure alkyl halides.

a)

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

b)

Assertion and Reason both are correct statements but Reason is not the correct explanation of Assertion.

c)

Assertion is correct but Reason is wrong.

d)

Assertion and Reason both are wrong statements

19.

In SN1 the order of reactivity of halide is:

a)

30 > 20 > 10 > methyl

b)

Methyl > 10>20 > 30

c)

30 > 20 > methyl > 10

d)

20 > 10 > methyl > 30

20.

Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane

a)

Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

b)

1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

c)

Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

d)

Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane

21.

1. Which alkyl halide has the highest reactivity for a particular alkyl group?

a)

R-F

b)

R-Cl

c)

R-I

d)

R-Br

22.

Write the order of increasing S1N reactivity for the following alkyl halides:

A) CH3-X

B) (CH3)2CH-X

C) (CH3)3C-X

D) (CH3)3C-CH2-X

a)

a) A>C>B>D

b)

b) C>A>B>D

c)

c) C>B>D>A

d)

d) D>C>B>A

23.

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

a)

Electrophilic elimination reaction

b)

Electrophilic substitution reaction

c)

Free radical addition reaction

d)

Nucleophilic substitution reaction

24.

. Which is the correct increasing order of boiling points of the following compounds?

a)

Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane

b)

Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane

c)

1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene

d)

1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

25.

Which reagent will you use for the following reaction?

CH3CH2CH2CH3 → CH3CH2CH2CH2Cl + CH3CH2CHClCH3

a)

Cl2 /UV light

b)

NaCl + H2SO4

c)

Cl2 gas in dark

d)

Cl2 gas in the presence of iron in dark

26.

3. Which of the following is not the method of preparation of alkyl halide?

a)

a) Darzen’s method

b)

b) Halogenation of alkene

c)

c) Addition of HX on alkenes

d)

d) Hydration of alkene

27.

Complete the following reaction
R-OH + PCl5 →\rightarrow  RCl + X + HCl
X is

a)

PCl3

b)

PCl5

c)

POCl3

d)

POBr3

28.

complete the following reaction
R-OH + X →\rightarrow RCl + SO2 + HCl

a)

SO2

b)

SOCl3

c)

SOCl2

d)

SOCl

29.

When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

a)

Ortho and meta

b)

Ortho and para

c)

Meta and para

d)

Ortho, meta and para

30.

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

a)

Ethyl chloride

b)

Isopropyl chloride

c)

Choro benzene

d)

Benzyl chloride

31.

Assertion: KCN reacts with methyl chloride to give methyl isocyanide.

Reason: CN- is an ambidentate nucleophile.

a)

A

b)

B

c)

C

d)

D

32.

In a SN1 reaction on chiral centres, there is

a)

100% retention

b)

100% inversion

c)

Racemization

d)

None

33.

Ambident nucleophile is

a)

CN

b)

H2O

c)

Cl

d)

NH2

34.

Haloalkane is a polar molecule that undergoes nucleophilic substitution through SN1 and SN2. Arrange the following haloalkanes in order of increasing rate of unimolecular nucleophilic substitution reaction:

I. 2-chloro-2-methylpropane

II. 2-chlorobutane

III. 1-chlorobutane

a)

I< II < III

b)

I< III < II

c)

III< I < II

d)

III< II < I

35.

Which of the following is a chiral molecule?

a)

CH2BrI

b)

CH3CBr2Cl

c)

(CH3)2CHCl

d)

CH3CHBrCH2CH3

36.

Assertion: Halogen acids react with alcohols to form haloalkanes.

Reason: Order of reactivity of halogen acids HCl>HBr>HI

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion.

c)

Assertion is true but reason is false.

d)

Assertion is false but reason is true.

37.

Assertion: Electron withdrawing groups in aryl halides increases the reactivity towards nucleophilic substitution.

Reason: 2, 4-Dinitrochlorobenzene is more reactive than chlorobenzene.

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion

c)

Assertion is true but reason is false

d)

Assertion is false but reason is true.

38.

Assertion (A): Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.

Reason (R): Phosphorus chlorides give pure alkyl halides.

a)

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

b)

Assertion and Reason both are correct statements but Reason is not the correct explanation of Assertion.

c)

Assertion is correct but Reason is wrong.

d)

Assertion and Reason both are wrong statements

39.

In SN1 the order of reactivity of halide is:

a)

30 > 20 > 10 > methyl

b)

Methyl > 10>20 > 30

c)

30 > 20 > methyl > 10

d)

20 > 10 > methyl > 30

40.

Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane

a)

Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

b)

1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

c)

Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

d)

Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane

41.

1. Which alkyl halide has the highest reactivity for a particular alkyl group?

a)

R-F

b)

R-Cl

c)

R-I

d)

R-Br

42.

Write the order of increasing S1N reactivity for the following alkyl halides:

A) CH3-X

B) (CH3)2CH-X

C) (CH3)3C-X

D) (CH3)3C-CH2-X

a)

a) A>C>B>D

b)

b) C>A>B>D

c)

c) C>B>D>A

d)

d) D>C>B>A

43.

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

a)

Electrophilic elimination reaction

b)

Electrophilic substitution reaction

c)

Free radical addition reaction

d)

Nucleophilic substitution reaction

44.

. Which is the correct increasing order of boiling points of the following compounds?

a)

Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane

b)

Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane

c)

1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene

d)

1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

45.

Which reagent will you use for the following reaction?

CH3CH2CH2CH3 → CH3CH2CH2CH2Cl + CH3CH2CHClCH3

a)

Cl2 /UV light

b)

NaCl + H2SO4

c)

Cl2 gas in dark

d)

Cl2 gas in the presence of iron in dark

46.

3. Which of the following is not the method of preparation of alkyl halide?

a)

a) Darzen’s method

b)

b) Halogenation of alkene

c)

c) Addition of HX on alkenes

d)

d) Hydration of alkene

47.

Complete the following reaction
R-OH + PCl5  →\rightarrow  RCl + X + HCl
X is

a)

PCl3

b)

PCl5

c)

POCl3

d)

POBr3

48.

complete the following reaction
R-OH + X  →\rightarrow  RCl + SO2 + HCl

a)

SO2

b)

SOCl3

c)

SOCl2

d)

SOCl

49.

When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

a)

Ortho and meta

b)

Ortho and para

c)

Meta and para

d)

Ortho, meta and para

50.

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

a)

Ethyl chloride

b)

Isopropyl chloride

c)

Choro benzene

d)

Benzyl chloride

51.

Assertion: KCN reacts with methyl chloride to give methyl isocyanide.

Reason: CN- is an ambidentate nucleophile.

a)

A

b)

B

c)

C

d)

D

52.

In a SN1 reaction on chiral centres, there is

a)

100% retention

b)

100% inversion

c)

Racemization

d)

None

53.

Ambident nucleophile is

a)

CN

b)

H2O

c)

Cl

d)

NH2

54.

Haloalkane is a polar molecule that undergoes nucleophilic substitution through SN1 and SN2. Arrange the following haloalkanes in order of increasing rate of unimolecular nucleophilic substitution reaction:

I. 2-chloro-2-methylpropane

II. 2-chlorobutane

III. 1-chlorobutane

a)

I< II < III

b)

I< III < II

c)

III< I < II

d)

III< II < I

55.

Which of the following is a chiral molecule?

a)

CH2BrI

b)

CH3CBr2Cl

c)

(CH3)2CHCl

d)

CH3CHBrCH2CH3

56.

Assertion: Halogen acids react with alcohols to form haloalkanes.

Reason: Order of reactivity of halogen acids HCl>HBr>HI

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion.

c)

Assertion is true but reason is false.

d)

Assertion is false but reason is true.

57.

Assertion: Electron withdrawing groups in aryl halides increases the reactivity towards nucleophilic substitution.

Reason: 2, 4-Dinitrochlorobenzene is more reactive than chlorobenzene.

a)

Both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

Both assertion and reason are true but reason is not the correct explanation of the assertion

c)

Assertion is true but reason is false

d)

Assertion is false but reason is true.

58.

Assertion (A): Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.

Reason (R): Phosphorus chlorides give pure alkyl halides.

a)

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

b)

Assertion and Reason both are correct statements but Reason is not the correct explanation of Assertion.

c)

Assertion is correct but Reason is wrong.

d)

Assertion and Reason both are wrong statements

59.

In SN1 the order of reactivity of halide is:

a)

30 > 20 > 10 > methyl

b)

Methyl > 10>20 > 30

c)

30 > 20 > methyl > 10

d)

20 > 10 > methyl > 30

60.

Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane

a)

Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

b)

1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

c)

Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

d)

Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane

61.

Nguyên tố nào sau đây thuộc nhóm Halogen?

a)

Ne

b)

O

c)

Br

d)

Fe

62.

Dung dịch X không màu, tác dụng với dung dịch AgNO3  tạo kết tủa màu vàng. Dung dịch muối X là

a)

NaI

b)

NaF

c)

NaCl

d)

NaBr

63.

Chất nào sau đây tác dụng được với H2 ngay cả khi ở trong bóng tối và ở nhiệt độ rất thấp?

a)

F2

b)

Br2

c)

I2

d)

Cl2

64.

Dãy hydrohalic acid nào sau đây được sắp xếp đúng theo thứ tự tính acid giảm dần?

a)

HCl, HBr, HI, HF.

b)

HBr, HI, HF, HCl.

c)

HI, HBr, HCl, HF.

d)

HF, HCl, HBr, HI.

65.

Trong phản ứng hóa học: Cl2 + 2NaOH →\rightarrow NaCl + NaClO + H2O. Clo đóng vai trò

a)

chất khử

b)

chất oxi hoá

c)

vừa là chất oxi hoá, vừa là chất khử

d)

không là chất oxi hoá, không là chất khử

66.

Cấu hình e lớp ngoài cùng của nguyên tử các nguyên tố halogen là

a)

ns2np4.

b)

ns2np5

c)

ns2np3

d)

ns2np6

67.

Liên kết trong các phân tử đơn chất halogen là gì?

a)

Liên kết cho nhận

b)

Liên kết ion

c)

Liên kết cộng hóa trị không cực.

d)

Liên kết cộng hóa trị có cực.

68.

Ứng dụng nào sau đây không phải của Chlorine (Cl2)?

a)

Xử lí nước bể bơi.

b)

Sát trùng vết thương trong y tế.

c)

Sản xuất nhựa PVC.

d)

Sản xuất bột tẩy trắng.

69.

Phát biểu nào sau đây không đúng về halogen?

a)

Là những phi kim mạnh nhất trong mỗi chu kỳ.

b)

Khả năng oxi hoá giảm từ F2 đến I2.

c)

Có số oxi hoá:  –1, +1, +3, +5, +7 trong các hợp chất

d)

Nhiệt độ nóng chảy, nhiệt độ sôi tăng dần từ F2 đến I2

70.

Bình bằng thủy tinh sẽ không chứa được dung dịch acid nào sau đây?

a)

HF

b)

HCl

c)

HNO3

d)

H2SO4

71.

Halogen ở thể rắn (điều kiện thường), có tính thăng hoa khi đun nóng là

a)

Fluorine

b)

Chlorine

c)

Bromine

d)

Iodine

72.

Phát biểu nào sau đây không đúng?

a)

Flo có tính oxi hoá mạnh hơn clo.

b)

Dung dịch HF hoà tan được SiO2.

c)

Muối AgI không tan trong nước, muối AgF tan trong nước.

d)

Fluorine có tính oxi hoá mạnh hơn chlorine, oxi hoá Cl- trong dung dịch NaCl thành Cl2.

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