Tamil Nadu Board of Secondary EducationHSC Science Class 11th

# Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 14 - Haloalkanes and Haloarenes [Latest edition]

## Chapter 14: Haloalkanes and Haloarenes

Choose the best answerWrite brief answer to the following questions.
Choose the best answer [Pages 251 - 254]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide Chapter 14 Haloalkanes and HaloarenesChoose the best answer [Pages 251 - 254]

Choose the best answer | Q I. 1. | Page 251

The IUPAC name of is

• 2 – Bromo pent – 3 – ene

• 4 – Bromo pent – 2 – ene

• 2 – Bromo pent – 4 – ene

• 4 – Bromo pent – 1 – ene

Choose the best answer | Q I. 2. | Page 251

Of the following compounds, which has the highest boiling point?

• n – Butyl chloride

• Isobutyl chloride

• t – Butyl chloride

• n – Propyl chloride

Choose the best answer | Q I. 3. | Page 251

Arrange the following compounds in increasing order of their density

1. CCl4
2. CHCl3
3. CH2Cl2
4. CH3Cl
• D < C < B < A

• C > B > A > D

• A < B < C < D

• C > A > B > D

Choose the best answer | Q I. 4. | Page 251

With respect to the position of – Cl in the compound CH3 – CH = CH – CH2 – Cl, it is classified as ______.

• Vinyl

• Allyl

• Secondary

• Aralkyl

Choose the best answer | Q I. 5. | Page 251

What should be the correct IUPAC name of diethyl chloromethane?

• 3 – Chloro pentane

• 1 – Chloropentane

• 1 – Chloro – 1, 1 – diethyl methane

• 1- Chloro-1-ethyl propane

Choose the best answer | Q I. 6. | Page 252

C -X bond is strongest in ______.

• Chloromethane

• Iodomethane

• Bromomethane

• Fluoromethane

Choose the best answer | Q I. 7. | Page 252

In the reaction . X is _______.

Choose the best answer | Q I. 8. | Page 252

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH- ion?

1. $\begin{array}{cc}\ce{CH3 - CH - CH2Br}\\ |\phantom{....}\\\ce{C2H5}\end{array}$
2. $\begin{array}{cc}\ce{CH3}\\ |\phantom{.}\\\ce{H3C - C - C2H5}\\ |\phantom{.}\\\ce{Br}\end{array}$
3. $\begin{array}{cc}\ce{H}\\ |\phantom{.}\\\ce{CH3 - C - C2H5}\\ |\phantom{.}\\\ce{Cl}\end{array}$
• (i)

• (ii) and (iii)

• (iii)

• (i) and (ii)

Choose the best answer | Q II. 9. | Page 252

The treatment of ethyl formate with excess of RMgX gives

• $\begin{array}{cc}\ce{R - C - R}\\||\\\ce{O}\end{array}$

• $\begin{array}{cc}\ce{R - CH - R}\\|\\\phantom{..}\ce{OH}\end{array}$

• R- CHO

• R- O – R

Choose the best answer | Q I. 10. | Page 252

Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form ______.

• Chlorobenzene

• Benzyl chloride

• Benzal chloride

• Benzene hexachloride

Choose the best answer | Q I. 11. | Page 252

The name of C2F4C12 is ______.

• Freon – 112

• Freon – 113

• Freon – 114

• Freon – 115

Choose the best answer | Q I. 12. | Page 252

Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene chloride?

• Zn/methanol

• KOH/ethanol

• aqueous KOH

• ZnCl2/Con HCl

Choose the best answer | Q I. 13. | Page 252

Match the compounds given in Column I with suitable items given in Column II.

 Column I (Compound) Column II (Uses) A Iodoform 1 Fire extinguisher B Carbon tetra chloride 2 Insecticide C CFC 3 Antiseptic D DDT 4 Refrigerants
• A → 2, B → 4, C →1, D →3

• A → 3, B → 2, C →4, D →1

• A → 1, B → 2, C → 3, D → 4,

• A → 3 B → 1 C → 4 D → 2

Choose the best answer | Q I. 14. | Page 253

Assertion: In mono haloarenes, electrophilic substitution occurs at ortho and para positions.

Reason: Halogen atom is a ring deactivator.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Choose the best answer | Q I. 15. | Page 253

Consider the reaction,

$\ce{CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr}$

This reaction will be the fastest in

• ethanol

• b) methanol

• DMF (N, N’ – dimethyl formamide)

• water

Choose the best answer | Q I. 16. | Page 253

Freon-12 is manufactured from tetrachloro methane by ______.

• Wurtz reaction

• Swarts reaction

• Haloform reaction

• Gattermann reaction

Choose the best answer | Q I. 17. | Page 253

The most easily hydrolysed molecule under SN1 condition is ______.

• allyl chloride

• ethyl chloride

• ispropylchloride

• benzyl chloride

Choose the best answer | Q I. 18. | Page 253

The carbocation formed in SN1 reaction of alkyl halide in the slow step is ______.

• sp3 hybridized

• sp2 hybridized

• sp hybridized

• none of these

Choose the best answer | Q I. 19. | Page 253

The major products obtained when chlorobenzene is nitrated with HNO3 and con H2SO4

• 1 – chloro – 4 – nitrobenzene

• 1 – chloro – 2 – nitrobenzene

• 1 – chloro – 3 – nitrobenzene

• 1 – chloro – 1 – nitrobenzene

Choose the best answer | Q I. 20. | Page 253

Which one of the following is most reactive towards nucleophilic substitution reaction?

Choose the best answer | Q I. 21. | Page 253

Ethylidene chloride on treatment with aqueous KOH gives ______.

• acetaldehyde

• ehtyleneglycol

• formaldehyde

• glycoxal

Choose the best answer | Q I. 22. | Page 253

The raw material for Raschig process

• chloro benzene

• phenol

• benzene

• anisole

Choose the best answer | Q I. 23. | Page 254

Chloroform reacts with nitric acid to produce ______.

• nitro toluene

• nitro glycerine

• chloropicrin

• chloropicric acid

Choose the best answer | Q I. 24. | Page 254

$\ce{acetone ->[i) CH3MgI][ii) H2O/H^{-1}]}$X, X is ______.

• 2 – propanol

• 2 – methyl – 2 – propanol

• 1 – propanol

• acetonol

Choose the best answer | Q I. 25. | Page 254

Silver propionate when refluxed with Bromine in carbon tetrachloride gives ______.

• propionic acid

• chloroethane

• Bromo ethane

• chloro propane

Write brief answer to the following questions. [Pages 254 - 256]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide Chapter 14 Haloalkanes and HaloarenesWrite brief answer to the following questions. [Pages 254 - 256]

Write brief answer to the following questions. | Q II. 1. i) | Page 254

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

$\ce{CH3 – CH = CH – Cl}$

Write brief answer to the following questions. | Q II. 1. ii) | Page 254

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

C6H5CH2I

Write brief answer to the following questions. | Q II. 1. iii) | Page 254

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

$\begin{array}{cc}\ce{CH3 - CH - CH3}\\ |\phantom{..}\\\ce{Br}\end{array}$

Write brief answer to the following questions. | Q II. 1. iv) | Page 254

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

CH2 = CH – Cl

Write brief answer to the following questions. | Q II. 2. | Page 254

Why chlorination of methane is not possible in dark?

Write brief answer to the following questions. | Q II. 3. | Page 254

How will you prepare n propyl iodide from n-propyl bromide?

Write brief answer to the following questions. | Q II. 4. | Page 254

Which alkyl halide from the following pair is

1. chiral
2. undergoes faster SN2 reaction?

Write brief answer to the following questions. | Q II. 5. | Page 254

How does chlorobenzene react with sodium in the presence of ether? What is the name of the reaction?

Write brief answer to the following questions. | Q II. 6. | Page 254

Give reasons for the polarity of C – X bond in haloalkane.

Write brief answer to the following questions. | Q II. 7. | Page 254

Why is it necessary to avoid even traces of moisture during the use of Grignard reagent?

Write brief answer to the following questions. | Q II. 8. | Page 254

What happens when acetyl chloride is treated with an excess of CH3MgI?

Write brief answer to the following questions. | Q II. 9. | Page 254

Arrange the following alkyl halide in increasing order of bond enthalpy of RX.

CH3Br, CH3F, CH3Cl, CH3I

Write brief answer to the following questions. | Q II. 10. | Page 254

What happens when chloroform reacts with oxygen in the presence of sunlight?

Write brief answer to the following questions. | Q II. 11. | Page 254

Write down the possible isomers of C5H11Br and give their IUPAC and common names.

Write brief answer to the following questions. | Q II. 12. | Page 254

Mention any three methods of preparation of haloalkanes from alcohols.

Write brief answer to the following questions. | Q II. 13. | Page 254

Compare SN1 and SN2 reaction mechanisms.

Write brief answer to the following questions. | Q II. 14. | Page 254

Reagents and the conditions used in the reactions are given below. Complete the table by writing down the product and the name of the reaction.

 Reaction Product Name of the reaction $\ce{CH3CH2OH + SOCl2 ->[pyridine] ?}$ ______ ______ $\ce{CH3CH2Br + AgF ->}$ ? ______ ______ $\ce{C6H5Cl + Na ->[Ether]}$ ______ ______
Write brief answer to the following questions. | Q II. 15. | Page 254

Discuss the aromatic nucleophilic substitutions reaction of chlorobenzene.

#### Account for the following

Write brief answer to the following questions. | Q II. 16. (i) | Page 255

t – butyl chloride reacts with aqueous KOH by SN1 mechanism while n – butyl chloride reacts with SN2 mechanism.

Write brief answer to the following questions. | Q II. 16. (ii) | Page 255

p – dichlorobenzene has a higher melting point than those of o – and m – dichlorobenzene.

Write brief answer to the following questions. | Q II. 17. | Page 255

In an experiment ethyliodide in ether is allowed to stand over magnesium pieces. Magnesium dissolves and product is formed

1. Name the product and write the equation for the reaction.
2. Why all the reagents used in the reaction should be dry? Explain.
3. How is acetone prepared from the product obtained in the experiment.
Write brief answer to the following questions. | Q II. 18. i) | Page 255

Write a chemical reaction useful to prepare the following:

Freon – 12 from Carbon tetrachloride

Write brief answer to the following questions. | Q II. 18. ii) | Page 255

Write a chemical reaction useful to prepare the following:

Carbon tetrachloride from carbon disulphide.

Write brief answer to the following questions. | Q II. 19. | Page 255

What are Freons?

Write brief answer to the following questions. | Q II. 19. | Page 255

Discuss uses of ferons.

Write brief answer to the following questions. | Q II. 19. | Page 255

Discuss the environmental effects of freons.

Write brief answer to the following questions. | Q II. 20. i) | Page 255

Predict the product when Bromo ethane is treated with the following.

KNO2

Write brief answer to the following questions. | Q II. 20. ii) | Page 255

Predict the products when Bromo ethane is treated with the following.

AgNO2

Write brief answer to the following questions. | Q 21. | Page 254

Explain the mechanism of SN1 reaction by highlighting the stereochemistry behind it.

Write brief answer to the following questions. | Q II. 22. i) | Page 255

Write a short note on raschig process.

Write brief answer to the following questions. | Q II. 22. ii) | Page 255

Write a short note on Dows Process.

Write brief answer to the following questions. | Q II. 22. iii) | Page 255

Write a short note on Darzen’s process.

Write brief answer to the following questions. | Q II. 23. i) | Page 255

Starting from CH3MgI, How will you prepare the following?

Acetic acid

Write brief answer to the following questions. | Q II. 23. ii) | Page 255

Starting from CH3MgI, How will you prepare the following?

Acetone

Write brief answer to the following questions. | Q II. 23. iii) | Page 255

Starting from CH3MgI, How will you prepare the following?

Ethyl acetate

Write brief answer to the following questions. | Q II. 23. iv) | Page 255

Starting from CH3MgI, How will you prepare the following?

Iso propyl alcohol

Write brief answer to the following questions. | Q II. 23. v) | Page 255

Starting from CH3MgI, How will you prepare the following?

Methyl cyanide

Write brief answer to the following questions. | Q II. 24. i) | Page 255

Complete the following reaction.

$\ce{CH3 - CH = CH2 + HBr ->[Peroxide]}$

Write brief answer to the following questions. | Q II. 24. ii) | Page 255

Complete the following reaction.

$\ce{CH3 - CH2 - Br + NaSH ->[alcohol][H2O]}$

Write brief answer to the following questions. | Q II. 24. iii) | Page 255

Complete the following reaction.

$\ce{C6H5Cl + Mg ->[THF]}$

Write brief answer to the following questions. | Q II. 24. iv) | Page 255

Complete the following reaction.

$\ce{CHCl3 + HNO3 ->[\Delta]}$

Write brief answer to the following questions. | Q II. 24. v) | Page 255

Complete the following reaction.

$\ce{CCl4 + H2O ->[\Delta]}$

Write brief answer to the following questions. | Q II. 25. i) | Page 255

Explain the preparation of the following compound.

DDT

Write brief answer to the following questions. | Q II. 25. ii) | Page 255

Explain the preparation of the following compound.

Chloroform

Write brief answer to the following questions. | Q II. 25. iii) | Page 256

Explain the preparation of the following compound.

Biphenyl

Write brief answer to the following questions. | Q II. 25. (iv) | Page 256

Explain the preparation of the following compound.

Chloropicrin

Write brief answer to the following questions. | Q II. 25. (v) | Page 256

Explain the preparation of the following compound.

Freon-12

Write brief answer to the following questions. | Q II. 26. | Page 256

An organic compound (A) with molecular formula C2H5Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A), (B), (C).

Write brief answer to the following questions. | Q II. 27. | Page 256

The simplest alkene (A) reacts with HCl to form a compound (B). Compound (B) reacts with ammonia to form compound (C) of molecular formula C2H7N. Compound (C) undergoes carbylamine test. Identify (A),
(B) and (C).

Write brief answer to the following questions. | Q II. 28. | Page 256

A hydrocarbon C3H6(A) reacts with HBr to form compound (B). Compound (B) reacts with aqueous potassium hydroxide to give (C) of molecular formula C3H6O. What are the (A), (B) and (C). Explain the reactions.

Write brief answer to the following questions. | Q II. 29. | Page 256

Two isomers (A) and (B) have the same molecular formula C2H4Cl2. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C2H4O. Compound (B) reacts with aqueous KOH gives compound (D) of molecular formula C2H6O2. Identify (A), (B), (C) and (D).

## Chapter 14: Haloalkanes and Haloarenes

Choose the best answerWrite brief answer to the following questions.

## Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 14 - Haloalkanes and Haloarenes

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Concepts covered in Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 14 Haloalkanes and Haloarenes are Poly Halogen Compounds, Introduction to Haloalkanes and Haloarenes, Classification of Organic Halogen Compounds, Haloalkanes, Organo Metallic Compounds, Haloarenes.

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