# NCERT solutions for Chemistry Part 1 and 2 Class 11 chapter 13 - Hydrocarbons [Latest edition]

## Chapter 13: Hydrocarbons

EXERCISES
EXERCISES [Pages 398 - 405]

### NCERT solutions for Chemistry Part 1 and 2 Class 11 Chapter 13 HydrocarbonsEXERCISES [Pages 398 - 405]

EXERCISES | Q 13.1 | Page 404

How do you account for the formation of ethane during chlorination of methane?

EXERCISES | Q 13.2 - (a) | Page 404

Write IUPAC name of the following compound:

CH3CH = C(CH3)2

EXERCISES | Q 13.2 - (b) | Page 404

Write IUPAC name of the following compound:

CH2 = CH - C ≡ C - CH3

EXERCISES | Q 13.2 - (c) | Page 404

Write IUPAC name of the following compound:

EXERCISES | Q 13.2 - (d) | Page 404

Write IUPAC name of the following compound:

EXERCISES | Q 13.2 - (e) | Page 404

Write IUPAC name of the following compound:

EXERCISES | Q 13.2 - (f) | Page 404

Write IUPAC name of the following compound:

$\begin{array}{cc} \ce{CH3(CH2)4 CH(CH2)3 CH3}\\ |\phantom{..}\\ \phantom{..............}\ce{CH2 - CH(CH3)2} \end{array}$

EXERCISES | Q 13.2 - (g) | Page 404

Write IUPAC name of the following compound:

$\begin{array}{cc} \ce{CH3 - CH = CH - CH2 - CH = CH - CH - CH2 - CH = CH2}\\ \phantom{.................}|\\\phantom{.....................}\ce{C2H5}\end{array}$

EXERCISES | Q 13.3 - (a) | Page 404

For the following compound, write structural formula and IUPAC name for all possible isomers having the number of a double or triple bond as indicated:

C4H8 (one double bond)

EXERCISES | Q 13.3 - (b) | Page 404

For the following compound, write structural formula and IUPAC name for all possible isomers having the number of the double or triple bond as indicated:

C5H8 (one triple bond)

EXERCISES | Q 13.4 - (i) | Page 404

Write IUPAC name of the product obtained by the ozonolysis of the following compound.

Pent-2-ene

EXERCISES | Q 13.4 - (ii) | Page 404

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

3,4-Dimethyl-hept-3-ene

EXERCISES | Q 13.4 - (iii) | Page 404

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

2-Ethylbut-1-ene

EXERCISES | Q 13.4 - (iv) | Page 404

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

1-Phenylbut-1-ene

EXERCISES | Q 13.5 | Page 405

An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’.

EXERCISES | Q 13.6 | Page 405

An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.

EXERCISES | Q 13.7 | Page 405

Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?

EXERCISES | Q 13.8 - (i) | Page 405

Write a chemical equation for combustion reaction of the following hydrocarbon:

Butane

EXERCISES | Q 13.8 - (ii) | Page 405

Write a chemical equation for combustion reaction of the following hydrocarbon:

Pentene

EXERCISES | Q 13.8 - (iii) | Page 405

Write a chemical equation for combustion reaction of the following hydrocarbon:

Hexyne

EXERCISES | Q 13.8 - (iv) | Page 405

Write a chemical equation for combustion reaction of the following hydrocarbon:

Toluene

EXERCISES | Q 13.9 | Page 405

Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?

EXERCISES | Q 13.10 | Page 398

Why is benzene extra ordinarily stable though it contains three double bonds?

EXERCISES | Q 13.11 | Page 405

What are the necessary conditions for any system to be aromatic?

EXERCISES | Q 13.12 - (i) | Page 405

Explain why the following system is not aromatic?

EXERCISES | Q 13.12 - (ii) | Page 405

Explain why the following system is not aromatic?

EXERCISES | Q 13.12 - (iii) | Page 405

Explain why the following system is not aromatic?

EXERCISES | Q 13.13 - (i) | Page 405

How will you convert benzene into p-nitrobromobenzene?

EXERCISES | Q 13.13 - (ii) | Page 405

How will you convert benzene into m-nitrochlorobenzene?

EXERCISES | Q 13.13 - (iii) | Page 405

How will you convert benzene into p -nitrotoluene?

EXERCISES | Q 13.13 - (iv) | Page 405

How will you convert benzene into acetophenone?

EXERCISES | Q 13.14 | Page 405

In the alkane H3C–CH2–C(CH3)2–CH2–CH(CH3)2, identify 1°,2°,3° carbon atoms and give the number of H atoms bonded to each one of these.

EXERCISES | Q 13.15 | Page 405

What effect does branching of an alkane chain has on its boiling point?

EXERCISES | Q 13.16 | Page 405

Addition of HBr to propene yields 2-bromopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism.

EXERCISES | Q 13.17 | Page 405

Write down the products of ozonolysis of 1, 2-dimethylbenzene (o-xylene). How does the result support Kekulé structure for benzene?

EXERCISES | Q 13.18 | Page 405

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

EXERCISES | Q 13.19 | Page 405

Why does benzene undergo electrophilic substitution reactions easily and nucleophilic substitutions with difficulty?

EXERCISES | Q 13.20 - (i) | Page 405

How would you convert the following compound into benzene?

Ethyne

EXERCISES | Q 13.20 - (ii) | Page 405

How would you convert the following compound into benzene?

Ethene

EXERCISES | Q 13.20 - (iii) | Page 405

How would you convert the following compound into benzene?

Hexane

EXERCISES | Q 13.21 | Page 405

Write structures of all the alkenes which on hydrogenation give 2-methylbutane.

EXERCISES | Q 13.22 - (a) | Page 405

Arrange the set of compound in order of their decreasing relative reactivity with an electrophile, EChlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene.

EXERCISES | Q 13.22 - (b) | Page 405

Arrange the set of compound in order of their decreasing relative reactivity with an electrophile, EToluene, p-H3C–C6H4–NO2, p-O2N–C6H4–NO2.

EXERCISES | Q 13.23 | Page 405

Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

EXERCISES | Q 13.24 | Page 405

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

EXERCISES | Q 13.25 | Page 405

Why is Wurtz reaction not preferred for the preparation of alkanes containing odd number of carbon atoms? Illustrate your answer by taking one example

EXERCISES

## NCERT solutions for Chemistry Part 1 and 2 Class 11 chapter 13 - Hydrocarbons

NCERT solutions for Chemistry Part 1 and 2 Class 11 chapter 13 (Hydrocarbons) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Chemistry Part 1 and 2 Class 11 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Chemistry Part 1 and 2 Class 11 chapter 13 Hydrocarbons are Classification of Hydrocarbons, Alkanes - Introduction, Nomenclature and Isomerism, Preparation of Alkanes from Unsaturated Hydrocarbons, Alkyl Halides and Carboxylic Acids, Physical Properties of Alkanes, Chemical Properties of Alkanes, Conformations (Ethane), Alkenes - Introduction, Structure of Double Bond, Nomenclature, Isomerism, Preparation of Alkenes from Alkynes, Alkyl Halides, Vicinal Dihalides and Alcohols by Acidic Dehydration, Physical Properties of Alkenes, Chemical Properties of Alkenes, Alkynes - Introduction, Nomenclature and Isomerism, Structure of Triple Bond, Preparation of Alkynes from Calcium Carbide and Vicinal Dihalides, Physical Properties of Alkynes, Chemical Properties of Alkynes, Aromatic Hydrocarbons - Introduction, Nomenclature and Isomerism, Structure of Benzene, Aromaticity, Preparation of Benzene, Physical Properties of Aromatic Hydrocarbons, Chemical Properties of Aromatic Hydrocarbons, Electrophilic Substitution Reactions, Mechanism of Electrophilic Substitution Reactions, Directive Influence of a Functional Group in Monosubstituted Benzene, Carcinogenicity and Toxicity.

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