The correct match between item I and item II is Item I (Compound) Item II (Reagent) a . Lysine p . 1 - naphthol b . Furfural q . Ninhydrin c . Benzyl alcohol r . KMnO 4 d . Styrene s . Ceric ammonium nitrate

a → q , b → p , c → s , d → r

a → q , b → r , c → s , d → p

a → r , b → p , c → q , d → s

a → q , b → p , c → r , d → s

HARD

Earn 100

Consider the following reaction.

On estimation of bromine in $1.00 g$ of $R$ using Carius method, the amount of $AgBr$ formed (in $g$ ) is____[Given: Atomic mass of $H = 1, C = 12, O = 16, P = 31, Br = 80, Ag = 108$ ]

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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

In Carius method of estimation of halogen,

0.172 g

of an organic compound showed presence of

0.08 g

of bromine. Which of these is the correct structure of the compound ?

MEDIUM

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:

EASY

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

The reddish brown precipitate formed in the Fehling's test for aldehydes (RCHO) is due to the formation of

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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

0.25 g

of an organic compound containing chlorine gave

0.40 g

of silver chloride in Carius estimation. The percentage of chlorine present in the compound is [in nearest integer]
(Given: Molar mass of

Ag

108 g {mol}^{- 1}

and that of

Cl

35.5 g {mol}^{- 1}

)

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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

EASY

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

Acetic acid reacts with sodium metal at room temperature to produce

HARD

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?

Question Image

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

In Carius method of estimation of halogen.

0.45 g

of an organic compound gave

0.36 g

AgBr

. Find out the percentage of bromine in the compound.
(Molar masses :

AgBr = 188 g {mol}^{- 1} : Br = 80 g {mol}^{- 1}

)

EASY

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

The correct match between item

I

and item

II

Item $I$ (Compound)		Item $II$ (Reagent)
$a .$	Lysine	$p .$	$1 -$ naphthol
$b .$	Furfural	$q .$	Ninhydrin
$c .$	Benzyl alcohol	$r .$	${KMnO}_{4}$
$d .$	Styrene	$s .$	Ceric ammonium nitrate

EASY

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

In Carius method for estimation of halogens, $0.2 g$ of an organic compound gave $0.188 g$ of $AgBr .$ The percentage of bromine in the compound is __________. (Nearest integer)

[Atomic mass: $Ag = 108, Br = 80$ ]

EASY

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

In the following reaction

Question Image

The major product is

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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?

EASY

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?

HARD

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

HARD

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:

MEDIUM

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

In the estimation of bromine,

0.5 g

of an organic compound gave

0.40 g

of silver bromide. The percentage of bromine in the given compound is______

%

(nearest integer)
(Relative atomic masses of

Ag

and

Br

are

108 u

and

80 u

, respectively).

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)

Consider the following reaction. On estimation of bromine in 1.00 g of R using Carius method, the amount of AgBr formed (in g) is____[Given: Atomic mass of H=1, C=12, O=16, P=31, Br=80, Ag=108]

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

Learn and Prepare for any exam you want !

Consider the following reaction.

On estimation of bromine in $1.00 g$ of $R$ using Carius method, the amount of $AgBr$ formed (in $g$ ) is____[Given: Atomic mass of $H = 1, C = 12, O = 16, P = 31, Br = 80, Ag = 108$ ]