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0.765g of an acid gives 0.535g of $C O_{2}$ and 0.138 g of $H_{2} O$ . Then, the ratio of the percentage of carbon and hydrogen is

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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

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

HARD

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

An organic compound on combustion gives

0.22 g of {CO}_{2}, and 0.126 g of H_{2} O

. If the percentage of

C

in given organic compound is

40 %

, the percentage of hydrogen will be?

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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

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

0.0833

mole of a carbohydrate of empirical formula

{CH}_{2} O

contains

1.00 g

of hydrogen. The molecular formula of the carbohydrate is

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

An organic compound ‘A’ is oxidized with

N a_{2} O_{2}

followed by boiling with

H N O_{3} .

The resultant solution is then treated with ammonium molybdate to yield a yellow percipitate. Based on a above observation, the element present in the given 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:

HARD

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

An organic compound weighing

0.15 g

gave on Carius estimation,

0.12 g

AgBr

. The percentage of

Br

in the compound will be close to

(

At. Mass

Ag = 108, Br = 80)

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

120 g

of an organic compound which contains only carbon and hydrogen on complete combustion gives

330 g

{CO}_{2}

and

270 g

of water. The percentage of carbon and hydrogen in the organic compound are respectively

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

When

0.01 mol

of an organic compound containing

60 %

carbon was burnt completely,

4.4 g

{CO}_{2}

was produced. The molar mass of compound is _____

{gmol}^{- 1}

(Nearest integer)

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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 formula of a gaseous hydrocarbon which requires 6 times of its own volume of

O_{2}

for complete oxidation and produces

4

times its own volume of

{CO}_{2}

C_{x} H_{y} .

The value of

y

is ________.

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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

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

Which of the following is used for the estimation of halogens in organic compounds?

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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

Which of the following is a FALSE statement?

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

When a hydrocarbon

A

undergoes complete combustion it requires

11

equivalents of oxygen and produces

4

equivalents of water. What is the molecular formula of

A

MEDIUM

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

64 g

of an organic compound contains

24 g

of carbon,

8 g

of hydrogen and the rest oxygen. The empirical formula of the compound is

HARD

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

Complete combustion of

1.80 g

of an oxygen containing compound

(C_{x} H_{y} O_{z})

gave

2.64 g

{CO}_{2}

and

1.08 g

H_{2} O .

The percentage of oxygen in the organic compound is :

0.765g of an acid gives 0.535g of CO2 and 0.138 g of H2O. Then, the ratio of the percentage of carbon and hydrogen is

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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0.765g of an acid gives 0.535g of $C O_{2}$ and 0.138 g of $H_{2} O$ . Then, the ratio of the percentage of carbon and hydrogen is