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NCERT solutions Chemistry Class 11 Part 2 chapter 13 Hydrocarbons

Chapters

NCERT Chemistry Class 11 Part 2

Chemistry Textbook for Class 11 Part 2

Chapter 13 - Hydrocarbons

Pages 362 - 397

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

Q 1 | Page 396

Write IUPAC names of the following compounds: CH3CH=C(CH3)2

Q 2.1 | Page 396

Write IUPAC names of the following compounds: CH2=CH-C≡C-CH3

Q 2.2 | Page 396

Write IUPAC names of the following compounds:

 

Q 2.3 | Page 396

Write IUPAC names of the following compounds :

Q 2.4 | Page 396

Write IUPAC names of the following compounds :

Q 2.5 | Page 396

Write IUPAC names of the following compounds:

Q 2.6 | Page 396

Write IUPAC names of the following compounds :

Q 2.7 | Page 396

For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:

C4H8 (one double bond)

Q 3.1 | Page 396

For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of the double or triple bond as indicated:

C5H8 (one triple bond)

Q 3.2 | Page 396

Write IUPAC names of the products obtained by the ozonolysis of the following compounds

 Pent-2-ene

Q 4.1 | Page 396

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:

3,4-Dimethyl-hept-3-ene

Q 4.2 | Page 396

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:

2-Ethylbut-1-ene 

Q 4.3 | Page 396

Write IUPAC names of the products obtained by the ozonolysis of the following compounds: 

1-Phenylbut-1-ene

Q 4.4 | Page 396

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

Q 5 | Page 397

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’.

Q 6 | Page 397

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

Q 7 | Page 397

Write chemical equations for combustion reaction of the following hydrocarbons:

Butane

Q 8.1 | Page 397

Write chemical equations for combustion reaction of the following hydrocarbons: 

Pentene 

Q 8.2 | Page 397

Write chemical equations for combustion reaction of the following hydrocarbons:

Hexyne 

Q 8.3 | Page 397

Write chemical equations for combustion reaction of the following hydrocarbons:

Toluene

Q 8.4 | Page 397

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

Q 9 | Page 397

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

Q 10 | Page 397

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

Q 11 | Page 397

Explain why the following systems are not aromatic?

Q 12.1 | Page 397

Explain why the following systems are not aromatic?

Q 12.2 | Page 397

Explain why the following systems are not aromatic?

Q 12.3 | Page 397

How will you convert benzene into p-nitrobromobenzene 

Q 13.1 | Page 397

How will you convert benzene into m-nitrochlorobenzene

Q 13.2 | Page 397

How will you convert benzene into -nitrotoluene

Q 13.3 | Page 397

How will you convert benzene into acetophenone

Q 13.4 | Page 397

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.

Q 14 | Page 397

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?

a)

b)

c)

Q 15 | Page 362

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

Q 15 | Page 397

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.

Q 16 | Page 397

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

Q 17 | Page 397

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

Q 18 | Page 397

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

Q 19 | Page 397

How would you convert the following compounds into benzene?

Ethyne 

Q 20.1 | Page 397

How would you convert the following compounds into benzene?

Ethene 

Q 20.2 | Page 397

How would you convert the following compounds into benzene?

Hexane

Q 20.3 | Page 397

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

Q 21 | Page 397

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E+

Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene

Q 22.1 | Page 397

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E+

Toluene, p-H3C–C6H4–NO2p-O2N–C6H4–NO2.

Q 22.2 | Page 397

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

Q 23 | Page 397

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

Q 24 | Page 397

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

Q 25 | Page 397

NCERT Chemistry Class 11 Part 2

Chemistry Textbook for Class 11 Part 2
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