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What are components used in the setup for Dumas method?

Important Questions on Organic Chemistry: Some Basic Principles and Techniques

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

In Duma's method of estimation of nitrogen, $0.1840 g$ of an organic compound gave $30 mL$ of nitrogen collected at $287 K$ and $758 mm$ of $Hg$ pressure. The percentage composition of nitrogen in the compound is ______. (Round off to the Nearest Integer).

[Given : Aqueous tension at $287 K = 14 mm$ of $Hg$ ]

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products?

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

Nitrogen can be estimated by Kjeldahl's method for which of the following compound?

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

The transformation occurring in Duma's method is given below

C_{2} H_{7} N + (2 x + \frac{y}{2}) CuO \to {xCO}_{2} + \frac{y}{2} H_{2} O + \frac{z}{2} N_{2} + (2 x + \frac{y}{2}) Cu

The value of

y

is (Integer answer)

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

For the estimation of nitrogen,

1.4 g

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

60 ml

\frac{M}{10}

sulphuric acid. The unreacted acid required

20 ml

\frac{M}{10}

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

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

The number of moles of

CuO,

that will be utilized in Dumas method for estimating nitrogen in a sample of

57.5 g

N, N -

dimethylaminopentane is ________

\times 10^{- 2} .

(Nearest integer)

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

In the Kjeldahl's method of estimation of nitrogen, ammonia gas evolved from

0.3 g

of an organic compound was absorbed in

60 mL

\frac{1}{10} M

sulphuric acid. The unused acid required

40 mL

\frac{N}{10} NaOH

for complete neutralisation. The weight percentage of nitrogen in the organic compound is

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from

0.55 g

of the compound neutralised

12.5 mL

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

solution. The percentage of nitrogen in the compound is (Nearest integer)

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

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

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

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

0.75 g

of sample neutralized

10 m l

1 M H_{2} {S O}_{4}

The percentage of nitrogen in the soil is:

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

During estimation of

N

present in an orgonic compound by Kjeldahl's method, the ammonia evolved from

0.5 g

of the compound in Kjeldahl 's estimation of

N,

neutralized

10 mL

1 {MH}_{2} {SO}_{4} .

The

%

N

in the compound is

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

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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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

0.2 g

of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of

N_{2}

evolved (at STP) was found to be

22.400 mL

. The percentage of nitrogen in the compound is - [nearest integer] (Given: Molar mass of

N_{2}

28 g {mol}^{- 1}

, Molar volume of

N_{2}

STP : 22.4 L

)

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

0.8 g

of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be

42 %

, then.......

mL

1 M

H_{2} {SO}_{4}

would have been neutralized by the ammonia evolved during the analysis.

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

0.166 g

sample of an organic compound was digested with conc.

H_{2} {SO}_{4}

and then distilled with

NaOH

. The ammonia gas evolved was passed through

50.0 mL

0.5 N H_{2} {SO}_{4}

. The used acid required

30.0 mL

0.25 N NaOH

for complete neutralization. The mass percentage of nitrogen in the organic compound is

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from

0.25 g

of the compound neutralized

2.5 mL

2 {MH}_{2} {SO}_{4}

. The percentage of nitrogen present in organic compound is _____ .

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds?

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

The ammonia evolved from

2 g

of a compound in Kjeldahl's estimation of nitrogen neutralizes

10 mL of 2 M H_{2} {SO}_{4}

solution. The weight percentage of nitrogen in the compound is:

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Chemistry>Organic Chemistry>Organic Chemistry: Some Basic Principles and Techniques>Quantitative Analysis of Organic Compounds

1.4 g of an organic compound was digested according to Kjeldahl's method and the ammonia evolved was absorbed in 60 mL of M/10

H_{2} S O_{4}

solution. The excess sulphuric acid required 20 mL of M/10 NaOH solution for neutralization. The percentage of nitrogen in the compound is:

What are components used in the setup for Dumas method?

Important Questions on Organic Chemistry: Some Basic Principles and Techniques

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