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11th CBSE

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Correct pair of compounds which give blue colouration/ precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is

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Important Questions on Organic Chemistry - Some Basic Principles and Techniques

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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

0.30 g

of an organic compound containing

C, H

and

O

on combustion yields

0.44 g

{CO}_{2}

and

0.18 g

H_{2} O

. If one mole of a compound weighs

60 g

, then molecular formula of 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

An organic compound

X

having molecular mass

60

is found to contain

C

= 20 %

H

= 6.67 %

and

N

= 46.67 %

, while rest is oxygen. On heating, it gives ammonia along with a solid residue. The solid residue gave violet colour with alkaline copper sulphate solution. The compound

X

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 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

25 mm

, 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

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

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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 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

HARD

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

Correct pair of compounds which give blue colouration/ precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is

Important Questions on Organic Chemistry - Some Basic Principles and Techniques

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