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11th CBSE

IMPORTANT

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In Duma's method for estimation of nitrogen, $0.25 g$ of an organic compound gave $40 mL$ of nitrogen collected at $300 K$ temperature and $725 mm$ pressure. If the aqueous tension at $300 K$ is $25 mm$ , the percentage of nitrogen in the compound is

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Important Questions on Organic Chemistry - Some Basic Principles and Techniques

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

Which of the following compounds will be suitable for Kjeldahl's method for nitrogen estimation?

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11th CBSE

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Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

In Kjeldahl's method for the estimation of nitrogen present in soil sample, ammonia evolved from

0.75 g

of sample neutralized

10 mL

1 M H_{2} {SO}_{4}

. The percentage of nitrogen in the soil is

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11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

The ammonia evolved from the treatment of

0.30 g

of an organic compound for the estimation of nitrogen was passed in

100 mL

0.1 M

sulphuric acid. The excess of acid required

20 mL

0.5 M

sodium hydroxide solution for complete neutralization. The organic compound is

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11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

29.5 mg

of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in

20 mL

0.1 M HCI

solution. The excess of the acid required

15 mL

0.1 M

NaOH

solution for complete neutralization, The percentage of nitrogen in the compound is

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11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

A sample of

0.5 g

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

50 mL

0.5 M

H_{2} {SO}_{4} .

The remaining acid after neutralisation by ammonia consumed

80 mL

0.5 M

NaOH

. The percentage of nitrogen in the organic compound is

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11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

For the estimation of nitrogen,

1.4 g

of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in

60 mL

\frac{M}{10}

of sulphuric acid. The unreacted acid required

20 mL \frac{M}{10}

sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

In carius method of estimation of halogens,

250 mg

of an organic compound gave

141 mg

AgBr

. The percentage of bromine in the compound is (at. mass

Ag

= 108

;

Br

= 80

)

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11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques>Competition Focus>Q V

In the estimation of sulphur by Carius method, $0.480 g$ of an organic compound gives $0.699 g$ of barium sulphate. The percentage of sulphur in this compound is(atomic masses : $Ba$ $= 137$ , $S$ $= 32$ and $O$ $= 16$ )

In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm , the percentage of nitrogen in the compound is

Important Questions on Organic Chemistry - Some Basic Principles and Techniques

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In Duma's method for estimation of nitrogen, $0.25 g$ of an organic compound gave $40 mL$ of nitrogen collected at $300 K$ temperature and $725 mm$ pressure. If the aqueous tension at $300 K$ is $25 mm$ , the percentage of nitrogen in the compound is