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

Match List-I with List-II List-I List-II Test/Reagents/Observation(s) Species detected (a) Lassaigne's Test (i) Carbon (b) Cu(II) oxide (ii) Sulphur (c) Silver nitrate (iii) N , S , P , and halogen (d) The sodium fusion extract gives black precipitate with acetic acid and lead acetate (iv) Halogen Specifically The correct match is :

( a ) - ( iii ) , ( b ) - ( i ) , ( c ) - ( iv ) , ( d ) - ( ii )

( a ) - ( iii ) , ( b ) - ( i ) , ( c ) - ( ii ) , ( d ) - ( iv )

( a ) - ( i ) , ( b ) - ( iv ) , ( c ) - ( iii ) , ( d ) - ( ii )

( a ) - ( i ) , ( b ) - ( ii ) , ( c ) - ( iv ) , ( d ) - ( iii )

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Phosphorus is estimated as

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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>Qualitative 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:

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

Reagent,

1 -

naphthylamine and sulphanilic acid in acetic acid is used for the detection of

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Chemistry>Organic Chemistry>Organic Chemistry- Some Basic Principles and Techniques>Qualitative 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

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

In the following reaction

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The major product is

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

When nitrogen and chlorine containing organic compound is reacted with sodium metal, it forms

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

Acetic acid reacts with sodium metal at room temperature to produce

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

Match List-I with List-II

	List-I		List-II
	Test/Reagents/Observation(s)		Species detected
(a)	Lassaigne's Test	(i)	Carbon
(b)	Cu(II) oxide	(ii)	Sulphur
(c)	Silver nitrate	(iii)	$N, S, P$ , and halogen
(d)	The sodium fusion extract gives black precipitate with acetic acid and lead acetate	(iv)	Halogen Specifically

The correct match is :

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

In the detection of nitrogen of an organic compound by Lassaigne's test, a prussian blue colour is obtained. This is due to the formation of which of the following complexes?

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

During the fusion of organic compound with sodium metal, nitrogen present in the organic compound is converted into

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

Sodium extract is heated with concentrated

H N O_{3}

before testing for halogens because :

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

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

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

Which of the following compound will give blood red colour while doing the Lassaigne's test for

N

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

Match the organic compounds in column -

I

with the Lassaigne's test result in column -

II

appropriately:

	Column – $I$		Column - $II$
A.	Aniline	i.	Red colour with $F e C l_{3}$
B.	Benzene sulfonic acid	ii.	Violet color with sodium nitroprusside
C.	Thiourea	iii.	Blue color with and acidic solution of $F e S O_{4}$

Phosphorus is estimated as

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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