Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.1

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Explain why alkyl groups act as electron donors when attached to a $π$ system.

Important Questions on Organic Chemistry – Some Basic Principles and Techniques

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.3

Write bond-line formulas for: $Isopropyl alcohol, 2, 3 - Dimethylbutanal, Heptan - 4 - one$ .

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.11

Draw the resonance structures for the following compound. Show the electron shift using curved-arrow notation.

C_{6} H_{5} - {CH}_{2}^{+}

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.18

Give a brief description of the principles of crystallisation techniques with an example.

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.28

Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.32

An organic compound contains

69 %

carbon and

4.8 %

hydrogen, the remainder being oxygen. Calculate the masses of carbon dioxide and water produced when

0.20 g

of this substance is subjected to complete combustion.

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.39

The best and latest technique for isolation, purification and separation of organic compounds is:

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.1

What are hybridisation states of each carbon atom in the following compounds?

{CH}_{2} = C = O, {CH}_{3} CH = {CH}_{2}, ({CH}_{3})_{2} CO, {CH}_{2} = CHCN, C_{6} H_{6}

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Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.2

Indicate the

σ and π

bonds in the following molecules:

C_{6} H_{6}, C_{6} H_{12}

(cyclic compound),

{CH}_{2} {Cl}_{2}, {CH}_{2} = C = {CH}_{2}, {CH}_{3} {NO}_{2}, {HCONHCH}_{3}