iCON Education - Practical Organic Chemistry JEE Mains Test

Candidate Name

Student

Exam Name

JEE Mains

Test Name

Practical Organic Chemistry

Subject

Chemistry

← Back to Practical Organic Chemistry

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01:13:00

Question 1: Palette 1/73

JEE Mains 2026 MCQ

A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the student has obtained 0.4813 g of barium sulphate. The percentage of sulphur present in the compound is _________. (Given Molar mass in g mol⁻¹ S: 32, BaSO₄: 233)

63.15%

21.05%

48.24%

42.10%

Question 2: Palette 2/73

JEE Mains 2026 MCQ

Method used for separation of mixture of products ( B and C ) obtained in the following reaction is

JEE Main 2026 (Online) 28th January Morning Shift Chemistry - Practical Organic Chemistry Question 19 English

simple distillation

sublimation

fractional distillation

steam distillation

Question 3: Palette 3/73

JEE Mains 2026 MCQ

In Carius method 0.2425 g of an organic compound gave 0.5253 g silver chloride. The percentage of chlorine in the organic compound is

87.65%

$53.58 \%$

$37.57 \%$

$34.79 \%$

Question 4: Palette 4/73

JEE Mains 2026 MCQ

$ \text { Match List - I with List - II. } $

List - I Functional group (detection)		List - II Change observed during detection
A.	Unsaturation (Baeyer's test)	I.	Red colour appears
B.	Alcoholic group (Ceric ammonium nitrate test)	II.	Silver mirror appears
C.	Aldehyde group (Tollen's reagent)	III.	Violet colour appears
D.	Phenolic group ( $\mathrm{FeCl}_3$ test)	IV.	Discharge of pink colour

A-IV, B-I, C-II, D-III

A-III, B-IV, C-I, D-II

A-III, B-IV, C-II, D-I

A-IV, B-III, C-II, D-I

Question 5: Palette 5/73

JEE Mains 2026 MCQ

When 1 g of compound $(\mathrm{X})$ is subjected to Kjeldahl's method for estimation of nitrogen, 15 mL 1 M $\mathrm{H}_2 \mathrm{SO}_4$ was neutralized by ammonia evolved. The percentage of nitrogen in compound $(\mathrm{X})$ is :

0.21

0.42

Question 6: Palette 6/73

JEE Mains 2026 MCQ

In Carius method, 0.75 g of an organic compound gave 1.2 g of barium sulphate, find percentage of sulphur (molar mass $32 \mathrm{~g} \mathrm{~mol}^{-1}$ ). Molar mass of barium sulphate is $233 \mathrm{~g} \mathrm{~mol}^{-1}$.

4.55%

16.48%

$10.30 \%$

$21.97 \%$

Question 7: Palette 7/73

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : A mixture of $\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}$ (sugar) and NaCl can be separated by dissolving sugar in alcohol, due to differential solubility.

Statement II : Rose essence from rose petals is seperated by steam distillation due to its high volatility and insolubility in $\mathrm{H}_2 \mathrm{O}$.

In the light of the above statements, choose the correct answer from the options given below :

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Question 8: Palette 8/73

JEE Mains 2026 MCQ

$\mathrm{R}_{\mathrm{f}}$ value for 2-methylpropene in a solvent system (Ethyl acetate + ether) is 0.42 . 2-methylpropene is treated with dilute $\mathrm{H}_2 \mathrm{SO}_4$ to give major organic product $(\mathrm{X})$. $R_f$ value for $(X)$ in the same solvent system under identical condition will be:

0.42

0.82

0.62

0.12

Question 9: Palette 9/73

JEE Mains 2026 MCQ

$ \text { Match List - I with List - II. } $

List - I Purification technique		List - II Used to separate
A.	Simple distillation	I.	Steam volatile compound
B.	Fractional distillation	II.	Two liquids with large difference in boiling points
C.	Steam distillation	III.	Liquid decomposing at its boiling point
D.	Distillation under reduced pressure	IV.	Two liquids with close boiling points

Choose the correct answer from the options given below :

A-II, B-III, C-I, D-IV

A-II, B-IV, C-I, D-III

A-II, B-IV, C-III, D-I

A-IV, B-III, C-II, D-I

Question 10: Palette 10/73

JEE Mains 2026 MCQ

$ \text { Match the LIST-I with LIST-II } $

List - I		List - II
	Compound		Test
A.		I.	Hinsberg's reagent test
B.		II.	Phthalein dye test
C.		III.	Lucas test
D.		IV.	Tollen’s test

$ \text { Choose the correct answer from the options given below : } $

A-III, B-I, C-IV, D-II

A-III, B-IV, C-I, D-II

A-I, B-III, C-II, D-IV

A-I, B-II, C-III, D-IV

Question 11: Palette 11/73

JEE Mains 2026 MCQ

Amongst the following, the total number of compounds soluble in aqueous NaOH at room temperature is :

JEE Main 2026 (Online) 4th April Morning Shift Chemistry - Practical Organic Chemistry Question 1 English

Question 12: Palette 12/73

JEE Mains 2026 MCQ

Complete combustion of $X$ g of an organic compound gave $0.25$ g of $CO_2$ and $0.12$ g of $H_2O$. If the % of carbon is $25\%$ and of hydrogen is $4.89\%$, then $X = \underline{\phantom{xxx}} \times 10^{-3}$ g. (Nearest integer)

(Molar mass of C, H and O are 12, 1 and 16 g mol$^{-1}$ respectively.)

273

2730

227

Question 13: Palette 13/73

JEE Mains 2026 MCQ

Given below are two statements :

Statement (I) : 1,2,3-Trihydroxypropane can be separated from water by simple distillation.

Statement (II) : An azeotropic mixture cannot be separated by fractional distillation.

In the light of the above statements, choose the correct answer from the options given below :

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Question 14: Palette 14/73

JEE Mains 2026 MCQ

Match List - I with List - II.

	List - I Mixture of Compounds		List - II Reagent used to distinguish
A	Diethyl amine + Ethyl amine	I	Bromine water
B	Acetaldehyde + Acetone	II	CHCl₃ + KOH, Δ
C	Ethanol + Phenol	III	Neutral FeCl₃
D	Benzoic acid + Cinnamic acid	IV	Ammoniacal silver nitrate

Choose the correct answer from the options given below :

A-IV, B-II, C-I, D-III

A-IV, B-II, C-III, D-I

A-II, B-IV, C-I, D-III

A-II, B-IV, C-III, D-I

Question 15: Palette 15/73

JEE Mains 2025 MCQ

A mixture of 1 g each of chlorobenzene, aniline, and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel. 5 M NaOH (30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel contains :

chlorobenzene and aniline

benzoic acid and aniline

benzoic acid

benzoic acid and chlorobenzene

Question 16: Palette 16/73

JEE Mains 2025 MCQ

Match List - I with List - II

	List - I (Separation of)		List - II (Separation Technique)
(A)	Aniline from aniline-water mixture	(I)	Simple distillation
(B)	Glycerol from spent-lye in soap industry	(II)	Fractional distillation
(C)	Different fractions of crude oil in petroleum industry	(III)	Distillation at reduced pressure
(D)	Chloroform-Aniline mixture	(IV)	Steam distillation

Choose the correct answer from the options given below :

(A)-(IV), (B)-(III), (C)-(II), (D)-(I)

(A)-(I), (B)-(II), (C)-(III), (D)-(IV)

(A)-(III), (B)-(IV), (C)-(I), (D)-(II)

(A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Question 17: Palette 17/73

JEE Mains 2025 MCQ

A toxic compound " A " when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative " B ". " B " is converted to " C " by diborane and can be used as an additive to petrol to reduce emission. "C" upon reaction with oleum at $140^{\circ} \mathrm{C}$ yields an inhalable anesthetic " D ". Identify " A ", " B ", " C " & " D ", respectively :

Methanol; acetic acid; ethanol; diethyl ether

Ethanol; acetonitrile; ethylamine; ethylene

Methanol; formaldehyde; methyl chloride; chloroform

Acetaldehyde; 2-hydroxypropanoic acid; propanoic acid; dipropyl ether

Question 18: Palette 18/73

JEE Mains 2025 MCQ

In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at $300 \mathrm{~K}=15 \mathrm{~mm} \mathrm{Hg}$ ) is___________%.

20.87

12.57

1.257

18.67

Question 19: Palette 19/73

JEE Mains 2025 MCQ

$ \text { Match List - I with List - II. } $

List - I (Purification technique)		List - II (Mixture of organic compounds)
(A)	$ \text { Distillation (simple) } $	(I)	Diesel + Petrol
(B)	$ \text { Fractional distillation } $	(II)	Aniline + Water
(C)	$ \text { Distillation under reduced pressure } $	(III)	Chloroform + Aniline
(D)	$ \text { Steam distillation } $	(IV)	Glycerol + Spent-lye

$ \text { Choose the correct answer from the options given below : } $

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

(A)-(II), (B)-(IV), (C)-(I), (D)-(III)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

Question 20: Palette 20/73

JEE Mains 2025 MCQ

Given below are two statements:

Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds.

Statement II: The sodium fusion extract of an organic compound having N and S gives prussian blue colour with $\mathrm{FeSO}_4$ and $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$

In the light of the above statements, choose the correct answer from the options given below

Both Statement I and Statement II are false

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Statement I is true but Statement II is false

Question 21: Palette 21/73

JEE Mains 2024 MCQ

Which of the following compound can give positive iodoform test when treated with aqueous $\mathrm{KOH}$ solution followed by potassium hypoiodite.

JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 38 English Option 1

JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 38 English Option 2

JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 38 English Option 3

$\mathrm{CH_3CH_2CH_2CHO}$

Question 22: Palette 22/73

JEE Mains 2024 MCQ

Match List I with List II

	LIST I (Test)		LIST II (Observation)
A.	$\mathrm{Br_2}$ water test	I.	Yellow orange or orange red precipitate formed
B.	Ceric ammonium nitrate test	II.	Reddish orange colour disappears
C.	Ferric chloride test	III.	Red colour appears
D.	2, 4 - DNP test	IV.	Blue, Green, Violet or Red colour appear

Choose the correct answer from the options given below:

A-II, B-III, C-IV, D-I

A-III, B-IV, C-I, D-II

A-I, B-II, C-III, D-IV

A-IV, B-I, C-II, D-III

Question 23: Palette 23/73

JEE Mains 2024 MCQ

Identify the incorrect statements regarding primary standard of titrimetric analysis.

(A) It should be purely available in dry form.

(B) It should not undergo chemical change in air.

(D) It should be readily soluble in water.

(E) $\mathrm{KMnO}_4$ & $\mathrm{NaOH}$ can be used as primary standard.

Choose the correct answer from the options given below :

(A) and (B) only

(B) and (E) only

Question 24: Palette 24/73

JEE Mains 2024 MCQ

Match List I with List II

	LIST I (Test)		LIST II (Identification)
A.	Bayer's test	I.	Phenol
B.	Ceric ammonium nitrate test	II.	Aldehyde
C.	Phthalein dye test	III.	Alcoholic-OH group
D.	Schiff's test	IV.	Unsaturation

Choose the correct answer from the options given below :

(A)-(IV), (B)-(I), (C)-(II), (D)-(III)

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

(A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Question 25: Palette 25/73

JEE Mains 2024 MCQ

The correct statement among the following, for a "chromatography" purification method is :

$\mathrm{R}_f$ of a polar compound is smaller than that of a non-polar compound.

Non-polar compounds are retained at top and polar compounds come down in column chromatography.

Organic compounds run faster than solvent in the thin layer chromatographic plate.

$\mathrm{R}_f$ is an integral value.

Question 26: Palette 26/73

JEE Mains 2024 MCQ

Which of the following statements are correct?

A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point.

B. Aniline can be purified by steam distillation as aniline is miscible in water.

C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope.

D. An organic compound is pure, if mixed M.P. is remained same.

Choose the most appropriate answer from the options given below :

A, C, D only

B, C, D only

A, B, D only

A, B, C only

Question 27: Palette 27/73

JEE Mains 2024 MCQ

In Kjeldahl's method for estimation of nitrogen, $\mathrm{CuSO}_4$ acts as :

catalytic agent

hydrolysis agent

reducing agent

oxidising agent

Question 28: Palette 28/73

JEE Mains 2024 MCQ

Given below are two statements :

Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.

Statement (II) : In this titration phenolphthalein can be used as indicator.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both Statement I and Statement II are correct

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Question 29: Palette 29/73

JEE Mains 2024 MCQ

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -

distillation

steam distillation

distillation under reduced pressure

crystallisation

Question 30: Palette 30/73

JEE Mains 2024 MCQ

Match List I with List II

	List - I (Technique)		List - II (Application
(A)	Distillation	(I)	Separation of glycerol from spent-lye
(B)	Fractional distillation	(II)	Aniline - Water mixture
(C)	Steam distillation	(III)	Separation of crude oil fractions
(D)	Distillation under reduced pressure	(IV)	Chloroform - Aniline

Choose the correct answer from the options given below:

A-I, B-II, C-IV, D-III

A-II, B-III, C-I, D-IV

A-IV, B-I, C-II, D-III

A-IV, B-III, C-II, D-I

Question 31: Palette 31/73

JEE Mains 2024 MCQ

Chromatographic technique/s based on the principle of differential adsorption is / are

A. Column chromatography

B. Thin layer chromatography

C. Paper chromatography

Choose the most appropriate answer from the options given below:

B only

A only

A & B only

C only

Question 32: Palette 32/73

JEE Mains 2024 MCQ

In chromyl chloride test for confirmation of $\mathrm{Cl}^{-}$ ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and $10 \% \mathrm{~H}_2 \mathrm{O}_2$ turns organic layer blue indicating formation of chromium pentoxide. The oxidation state of chromium in that is

+10

Question 33: Palette 33/73

JEE Mains 2024 MCQ

The technique used for purification of steam volatile water immiscible substances is :

Fractional distillation

Distillation

Fractional distillation under reduced pressure

Steam distillation

Question 34: Palette 34/73

JEE Mains 2023 MCQ

In Carius tube, an organic compound '$\mathrm{X}$' is treated with sodium peroxide to form a mineral acid 'Y'.

The solution of $\mathrm{BaCl}_{2}$ is added to '$\mathrm{Y}$' to form a precipitate 'Z'. 'Z' is used for the quantitative estimation of an extra element. '$\mathrm{X}$' could be

Cytosine

Methionine

Chloroxylenol

A nucleotide

Question 35: Palette 35/73

JEE Mains 2023 MCQ

Given below are two statements:

Statement I : Aqueous solution of K$_2$Cr$_2$O$_7$ is preferred as a primary standard in volumetric analysis over Na$_2$Cr$_2$O$_7$ aqueous solution.

Statement II : K$_2$Cr$_2$O$_7$ has a higher solubility in water than Na$_2$Cr$_2$O$_7$.

In the light of the above statements, choose the correct answer from the options given below:

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Question 36: Palette 36/73

JEE Mains 2023 MCQ

A compound '$\mathrm{X}$' when treated with phthalic anhydride in presence of concentrated $\mathrm{H}_{2} \mathrm{SO}_{4}$ yields '$\mathrm{Y}$'. '$\mathrm{Y}$' is used as an acid/base indicator. '$\mathrm{X}$' and '$\mathrm{Y}$' are respectively

Toludine, Phenolphthalein

Carbolic acid, Phenolphthalein

Salicylaldehyde, Phenolphthalein

Anisole, methyl orange

Question 37: Palette 37/73

JEE Mains 2023 MCQ

Given below are two statements:

Statement I : Methyl orange is a weak acid.

Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.

In the light of the above statement, choose the most appropriate answer from the options given below:

Both Statement I and Statement II are incorrect

Statement $\mathrm{I}$ is incorrect but Statement II is correct

Both statement I and Statement II are correct

Statement I is correct but Statement II is incorrect

Question 38: Palette 38/73

JEE Mains 2023 MCQ

Match List I with List II

	LIST I Element detected		LIST II Reagent used / Product formed
A.	Nitrogen	I.	$\mathrm{Na_2[Fe(CN)_5NO]}$
B.	Sulphur	II.	$\mathrm{AgNO_3}$
C.	Phosphorous	III.	$\mathrm{Fe_4[Fe(CN)_6]_3}$
D.	Halogen	IV.	$\mathrm{(NH_4)_2MoO_4}$

Choose the correct answer from the options given below:

A-III, B-I, C-IV, D-II

A-II, B-I, C-IV, D-III

A-IV, B-II, C-I, D-III

A-II, B-IV, C-I, D-III

Question 39: Palette 39/73

JEE Mains 2023 MCQ

Given below are two statements :

Statement I : Sulphanilic acid gives esterification test for carboxyl group.

Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both Statement I and Statement II are correct

Statement I is correct but Statement II is incorrect

Both Statement I and Statement II are incorrect

Statement I is incorrect but Statement II is correct

Question 40: Palette 40/73

JEE Mains 2023 MCQ

In Dumas method for the estimation of $\mathrm{N}_{2}$, the sample is heated with copper oxide and the gas evolved is passed over :

Copper oxide

Copper gauze

$\mathrm{Pd}$

$\mathrm{Ni}$

Question 41: Palette 41/73

JEE Mains 2023 MCQ

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

$\mathrm{NH_2OH.HCl}$

$\mathrm{N_2H_4.HCl}$

$\mathrm{CH_3NH_2.HCl}$

$\mathrm{NH_4Cl}$

Question 42: Palette 42/73

JEE Mains 2022 MCQ

In base vs. acid titration, at the end point methyl orange is present as

quinonoid form

heterocyclic form

phenolic form

benzenoid form

Question 43: Palette 43/73

JEE Mains 2022 MCQ

The reagent neutral ferric chloride is used to detect the presence of ______________

sulphide ion and alcoholic $-$OH group.

acetate ion and phenolic $-$OH group.

sulphide ion and phenolic $-$OH group.

acetate ion and alcoholic $-$OH group.

Question 44: Palette 44/73

JEE Mains 2022 MCQ

The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is :

NaFe[Fe(CN)₆]

Na[Cr(NH₃)₂(NCS)₄]

Na₂[Fe(CN)₅(NO)]

Na₄[Fe(CN)₅(NOS)]

Question 45: Palette 45/73

JEE Mains 2022 MCQ

Given below are two statements :

Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give NaCN and Na₂S.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Statement I is correct but Statement II is incorrect.

Statement I is incorrect but Statement II is correct.

Question 46: Palette 46/73

JEE Mains 2021 MCQ

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

Barfoed's test

Seliwanoff's test

Benedict's test

Biuret test for peptide bond

Question 47: Palette 47/73

JEE Mains 2021 MCQ

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is :

Fe₄[Fe(CN)₆]₃

K₅Fe[Fe(CN)₆]₂

HFe[Fe(CN)₆]

KFe[Fe(CN)₆]

Question 48: Palette 48/73

JEE Mains 2021 MCQ

Which one of the following complexes is violet in colour?

[Fe(CN)₆]^4$-$

[Fe(SCN)₆]^4$-$

Fe₄[Fe(CN₆)]₃ . H₂O

[Fe(CN)₅NOS]^4$-$

Question 49: Palette 49/73

JEE Mains 2021 MCQ

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :

HNO₃

AgNO₃

CuSO₄

BaSO₄

Question 50: Palette 50/73

JEE Mains 2021 MCQ

An inorganic Compound 'X' on treatment with concentrated H₂SO₄ produces brown fumes and gives dark brown ring with FeSO₄ in presence of concentrated H₂SO₄. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with H₂S gas. The precipitate 'Y' on treatment with concentrated HNO₃ followed by excess of NH₄OH further gives deep blue coloured solution, Compound 'X' is :

Co(NO₃)₂

Pb(NO₂)₂

Cu(NO₃)₂

Pb(NO₃)₂

Question 51: Palette 51/73

JEE Mains 2021 MCQ

Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of

N₂O

NO$_3^ - $

NO$_2^ - $

Question 52: Palette 52/73

JEE Mains 2021 MCQ

Match List - I with List - II :

	List - I Test/Reagents/Observation(s)		List - II 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)-(ii), (d)-(iv)

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

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

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

Question 53: Palette 53/73

JEE Mains 2021 MCQ

Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.

ketoses, proteins

proteins, ketoses

aldoses, ketoses

ketoses, aldoses

Question 54: Palette 54/73

JEE Mains 2021 MCQ

Which of the following is 'a' FALSE statement ?

Carius method is used for the estimation of nitrogen in an organic compound.

Kjeldahl's method is used for the estimation of nitrogen in an organic compound.

Carius tube is used in the estimation of sulphur in an organic compound.

Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as Mg₂P₂O₇ by adding magnesia mixture.

Question 55: Palette 55/73

JEE Mains 2021 MCQ

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

Nitric acid

Sodium hydroxide

Ammonia

Hydrochloric acid

Question 56: Palette 56/73

JEE Mains 2020 MCQ

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be

aqueous NaOH

aqueous NaHCO₃

aqueous NH₃

vinegar

Question 57: Palette 57/73

JEE Mains 2020 MCQ

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?

H₃C – CH₂ – Br

H₃C – Br

JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Practical Organic Chemistry Question 94 English Option 3

JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Practical Organic Chemistry Question 94 English Option 4

Question 58: Palette 58/73

JEE Mains 2020 MCQ

A, B and C are three biomolecules. The results of the tests performed on them are given below:

$ \begin{array}{|l|l|l|l|} \hline & \begin{array}{l} \text { Molisch's } \\ \text { Test } \end{array} & \begin{array}{l} \text { Barfoed } \\ \text { Test } \end{array} & \begin{array}{l} \text { Biuret } \\ \text { Test } \end{array} \\ \hline \text { A } & \text { Positive } & \text { Negative } & \text { Negative } \\ \hline \text { B } & \text { Positive } & \text { Positive } & \text { Negative } \\ \hline \text { C } & \text { Negative } & \text { Negative } & \text { Positive } \\ \hline \end{array} $

A, B and C are respectively :

A = Lactose, B = Glucose, C = Albumin

A = Lactose, B = Fructose, C = Alanine

A = Lactose, B = Glucose, C = Alanine

A = Glucose, B = Fructose, C = Albumin

Question 59: Palette 59/73

JEE Mains 2019 MCQ

An organic compound 'A' is oxidizod with Na₂O₂ followed by boiling with HNO₃. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate.
Based on above observation, the element present in the given compound is:

Fluorine

Phosphorus

Nitrogen

Sulphur

Question 60: Palette 60/73

JEE Mains 2019 MCQ

The organic compound that gives following qualitative analysis is :

	Test	Inference
(a)	Dil. HCl	Insoluble
(b)	NaOH solution	soluble
(c)	Br₂/water	Decolourization

JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Practical Organic Chemistry Question 97 English Option 1

JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Practical Organic Chemistry Question 97 English Option 2

JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Practical Organic Chemistry Question 97 English Option 3

JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Practical Organic Chemistry Question 97 English Option 4

Question 61: Palette 61/73

JEE Mains 2019 MCQ

An organic compound neither reacts with neutral ferric chloride solution nor with fehling solution. it however, reacts with Grignard reagent and gives positive iodoform test. The compound is :

JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 98 English Option 1

JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 98 English Option 2

JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 98 English Option 3

JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 98 English Option 4

Question 62: Palette 62/73

JEE Mains 2019 MCQ

An organic compound 'X' showing the following solubility profile is : JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 99 English

JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Practical Organic Chemistry Question 99 English

o-Toluidine

Benzamide

Oleic acid

m-Cresol

Question 63: Palette 63/73

JEE Mains 2019 MCQ

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)	Benzylalcohol	(R)	KMnO₄
(D)	Styrene	(S)	Ceric ammonium nitrate

(A) $ \to $ (Q); (B) $ \to $ (R); (C) $ \to $ (S); (D) $ \to $ (P)

(A) $ \to $ (Q); (B) $ \to $ (P); (C) $ \to $ (S); (D) $ \to $ (R)

(A) $ \to $ (R); (B) $ \to $ (P); (C) $ \to $ (Q); (D) $ \to $ (S)

(A) $ \to $ (Q); (B) $ \to $ (P); (C) $ \to $ (R); (D) $ \to $ (S)

Question 64: Palette 64/73

JEE Mains 2019 MCQ

The tests performed on compound X and their inferences are :

	Test	Inference
(a)	2, 4 - DNP test	Coloured precipitate
(b)	Idoform test	Yellow precipitate
(c)	Azo-dye test	No dye formation

Compound 'X' is :

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Practical Organic Chemistry Question 101 English Option 1

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Practical Organic Chemistry Question 101 English Option 2

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Practical Organic Chemistry Question 101 English Option 3

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Practical Organic Chemistry Question 101 English Option 4

Question 65: Palette 65/73

JEE Mains 2019 MCQ

The correct match between Item-I and Item-II is :

Item-I (drug)		Item-II (test)
A	Chloroxylenol	P	Carbylamine test
B	Norethindrone	Q	Sodium hydrogen carbonet test
C	Sulphapyridine	R	Ferric chloride test
D	Penicillin	S	Bayer's test

A $ \to $ R; B $ \to $ P; C $ \to $ S; D $ \to $ Q

A $ \to $ Q; B $ \to $ S; C $ \to $ P; D $ \to $ R

A $ \to $ R; B $ \to $ S; C $ \to $ P; D $ \to $ Q

A $ \to $ Q; B $ \to $ P; C $ \to $ S; D $ \to $ R

Question 66: Palette 66/73

JEE Mains 2018 MCQ

In a complexometric titration of metal ion with ligand
M(Metal ion) + L(Ligand) $ \to $ C(Complex) end point is estimated spectrophoto - metrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs, then the titration plot between absorbed light (A) versus volume of ligand 'L' (V) would look like :

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 104 English Option 1

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 104 English Option 2

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 104 English Option 3

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 104 English Option 4

Question 67: Palette 67/73

JEE Mains 2018 MCQ

For standardizing NaOH solution, which of the following is used as a primary standard ?

Ferrous Ammonium Sulfate

dil. HCl

Oxalic acid

Sodium tetraborate

Question 68: Palette 68/73

JEE Mains 2018 MCQ

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

JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 107 English Option 1

JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 107 English Option 2

JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 107 English Option 3

JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 107 English Option 4

Question 69: Palette 69/73

JEE Mains 2017 MCQ

Sodium salt of an organic acid ‘X’ produces effervescence with conc. H₂SO₄. ‘X’ reacts with the acidified aqueous CaCl₂ solution to give a white precipitate which decolourises acidic solution of KMnO₄. ‘X’ is :

CH₃COONa

Na₂C₂O₄

C₆H₅COONa

HCOONa

Question 70: Palette 70/73

JEE Mains 2016 MCQ

Sodium extract is heated with concentrated HNO₃ before testing for halogens because :

Silver halides are totally insoluble in nitric acid.

Ag₂S and AgCN are soluble in acidic medium.

S₂⁻ and CN⁻, if present, are decomposed by conc. HNO₃ and hence do not interfere in the test.

Ag reacts faster with halides in acidic medium.

Question 71: Palette 71/73

JEE Mains 2011 MCQ

Which of the following reagents may be used to distinguish between phenol and benzoic acid ?

Tollen’s reagent

Molisch reagent

Neutral FeCl₃

Aqueous NaOH

Question 72: Palette 72/73

JEE Mains 2010 MCQ

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 of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is

59.0

47.4

23.7

29.5

Question 73: Palette 73/73

JEE Mains 2004 MCQ

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

Fe₄[Fe(CN)₆]₃

Na₄[Fe(CN)₅NOS]

Fe(CN)₃

Na₃[Fe(CN)₆]

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