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

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IMPORTANT

Earn 100

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

Important Questions on Organic Chemistry – Some Basic Principles and Techniques

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.31

Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium extract for testing sulphur by lead acetate test?

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IMPORTANT

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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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.33

A sample of

0.50 g

of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in

50 ml

of

0.5 M

H_{2} {SO}_{4}

. The residual acid required

60 ml

of

0.5 M

solution of

NaOH

for neutralisation. Find the percentage composition of nitrogen in the compound.

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.34

0.3780 g

of an organic chloro compound gave

0.5740 g

of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound.

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.35

In the estimation of sulphur by Carius method,

0.468 g

of an organic sulphur compound afforded

0.668 g

of barium sulphate. Find out the percentage of sulphur in the given compound.

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.36

In the organic compound

{CH}_{2} = CH - {CH}_{2} - {CH}_{2} - C \equiv CH

, the pair of hybridised orbitals involved in the formation of

C_{2} - C_{3}

bond is:

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.37

In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of

MEDIUM

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IMPORTANT

Chemistry Part II Textbook for Class XI>Chapter 5 - Organic Chemistry – Some Basic Principles and Techniques>EXERCISES>Q 12.38

Which of the following carbocation is most stable?