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Practical Organic Chemistry PYQs - Last 10 Years

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ChemistryOrganic Chemistry2017-2026
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Practice 109 JEE Main Chemistry questions from Practical Organic Chemistry. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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2017-2026
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Last 10 Years Practical Organic Chemistry Questions

Showing 50 of 109 filtered questions.

1Practical Organic Chemistry
$\mathrm{R}_{\mathrm{f}}$ 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)...
MCQ+4 / -12026
2Practical Organic Chemistry
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...
MCQ+4 / -12026
3Practical Organic Chemistry
In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of $\mathrm{BaSO}_4$. The percentage of sulphur in the substance is $\_\_\_\_$%.
(Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{~S}: 32, \mathrm{BaSO...
INTEGER+4 / -12026
4Practical Organic Chemistry
\(\text { Match List - I with List - II. }\)


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MCQ+4 / -12026
5Practical Organic Chemistry
Amongst the following, the total number of compounds soluble in aqueous NaOH at room temperature is :
MCQ+4 / -12026
6Practical Organic Chemistry
2.0 g of a bromo hydrocarbon $(\mathrm{X})$ was subjected to Carius analysis, gave 3.36 g of AgBr . The percentage of carbon in the compound $(\mathrm{X})$ is $26.7 \%$. Total number of carbon atoms in the empirical formula for compound $(\...
INTEGER+4 / -12026
7Practical Organic Chemistry
\(\text { Match the LIST-I with LIST-II }\)


List - I
List - II



Compound

Test


A.

I.
Hinsberg's reagent test


B.

II.
Phthalein dye test


C.

I...
MCQ+4 / -12026
8Practical Organic Chemistry
In sulphur estimation, $2.0 \times 10^{-3} \mathrm{~mol}$ of an organic compound $(\mathrm{X})$ (molar mass $76 \mathrm{~g} \mathrm{~mol}^{-1}$ ) gave 0.4813 g of barium sulphate (molar mass $233 \mathrm{~g} \mathrm{~mol}^{-1}$ ). The perce...
INTEGER+4 / -12026
9Practical Organic Chemistry
Match List - I with List - II.



List - I Mixture of Compounds

List - IIReagent used to distinguish


A
Diethyl amine + Ethyl amine
I
Bromine water


B
Acetaldehyde + Acetone
II
CH...
MCQ+4 / -12026
10Practical Organic Chemistry
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 state...
MCQ+4 / -12026
11Practical Organic Chemistry
Consider the following reactions sequenceWhen the product (P) is subjected to Carius analysis using AgNO3, 1.0 g of the product (P) will produce _________ g of the precipitate of AgBr. (Nearest Integer)(Given : molar mass in g mol-1 C : 12,...
INTEGER+4 / -12026
12Practical Organic Chemistry
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 ma...
MCQ+4 / -12026
13Practical Organic Chemistry
Method used for separation of mixture of products ( B and C ) obtained in the following reaction is
MCQ+4 / -12026
14Practical Organic Chemistry
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...
MCQ+4 / -12026
15Practical Organic Chemistry
In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at 300 K and 715 mm pressure. The percentage of nitrogen in the organic compound is $\_\_\_\_$ $\%$.
(Aqueous tension at 300 K is 15 ...
INTEGER+4 / -12026
16Practical Organic Chemistry
\(\text { Match List - I with List - II. }\)
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overflow:hidden;padding:10px 5px;...
MCQ+4 / -12026
17Practical Organic Chemistry
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
MCQ+4 / -12026
18Practical Organic Chemistry
Sodium fusion extract of an organic compound $(\mathrm{Y})$ with $\mathrm{CHCl}_3$ and chlorine water gives violet color to the $\mathrm{CHCl}_3$ layer. 0.15 g of $(\mathrm{Y})$ gave 0.12 g of the silver halide precipitate in Carius method....
INTEGER+4 / -12026
19Practical Organic Chemistry
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 :
MCQ+4 / -12026
20Practical Organic Chemistry
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 $233 \mathrm{~g} \mathrm{~mol}^{-1}$.
MCQ+4 / -12026
21Practical Organic Chemistry
By usual analysis, 1.00 g of compound (X) gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound (X) is : (nearest integer)(Given, molar mass in g mol−1: O = 16, Mg = 24, P = 31)
MCQ+4 / -12026
22Practical Organic Chemistry
In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas $\left(\mathrm{N}_2\right)$ at 300 K temperature and 715 mm Hg pressure. The percentage composition of ' N ' in the organic compound is _____________ % (Nearest i...
INTEGER+4 / -12025
23Practical Organic Chemistry
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. Th...
MCQ+4 / -12025
24Practical Organic Chemistry
In Dumas' method for estimation of nitrogen 1 g of an organic compound gave 150 mL of nitrogen collected at 300 K temperature and 900 mm Hg pressure. The percentage composition of nitrogen in the compound is _______ % (nearest integer)
(Aqu...
INTEGER+4 / -12025
25Practical Organic Chemistry
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" ...
MCQ+4 / -12025
26Practical Organic Chemistry
Match List - I with List - II

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MCQ+4 / -12025
27Practical Organic Chemistry
0.1 mol of the following given antiviral compound $(\mathrm{P})$ will weigh ________ $\times 10^{-1} \mathrm{~g}$ (nearest integer).

(Given : molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{H}: 1, \mathrm{C}: 12, \mathrm{~N}: 14, \math...
INTEGER+4 / -12025
28Practical Organic Chemistry
\(\text { Match List - I with List - II. }\)

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MCQ+4 / -12025
29Practical Organic Chemistry
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 \math...
MCQ+4 / -12025
30Practical Organic Chemistry
In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is __________ $\times 10^{-1} \%$.
(Molar mass : $\mathrm{O}=16, \mathrm{~S}=32, \mathrm{Ba}=137$ in $\ma...
INTEGER+4 / -12025
31Practical Organic Chemistry
Given below are two statements :
Statement (I): In partition chromatography, stationary phase is thin film of liquid present in the inert support.
Statement (II): In paper chromatography, the material of paper acts as a stationary phase.
In...
MCQ+4 / -12025
32Practical Organic Chemistry
In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide ( AgBr ). The percentage of Bromine in the organic compound is ________ $\times 10^{-1} \%$ (Nearest integer).
(Given : Molar mass of Ag ...
INTEGER+4 / -12025
33Practical Organic Chemistry
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 ...
MCQ+4 / -12025
34Practical Organic Chemistry
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.
(C) It should be hygroscopic and should react with anothe...
MCQ+4 / -12024
35Practical Organic Chemistry

In the given TLC, the distance of spot A & B are 5 cm & 7 cm, from the bottom of TLC plate, respectively.
\(\mathrm{R}_{\mathrm{f}}\) value of \(\mathrm{B}\) is \(x \times 10^{-1}\) times more than \(\mathrm{A}\). The value of \(x\) is ___...
INTEGER+4 / -12024
36Practical Organic Chemistry
Match List I with List II

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...
MCQ+4 / -12024
37Practical Organic Chemistry
Which of the following compound can give positive iodoform test when treated with aqueous \(\mathrm{KOH}\) solution followed by potassium hypoiodite.
MCQ+4 / -12024
38Practical Organic Chemistry
Match List I with List II

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...
MCQ+4 / -12024
39Practical Organic Chemistry
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 ca...
MCQ+4 / -12024
40Practical Organic Chemistry
The correct statement among the following, for a "chromatography" purification method is :
MCQ+4 / -12024
41Practical Organic Chemistry
Match List I with List II

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...
MCQ+4 / -12024
42Practical Organic Chemistry
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...
MCQ+4 / -12024
43Practical Organic Chemistry
On a thin layer chromatographic plate, an organic compound moved by \(3.5 \mathrm{~cm}\), while the solvent moved by \(5 \mathrm{~cm}\). The retardation factor of the organic compound is ________ \(\times 10^{-1}\).
INTEGER+4 / -12024
44Practical Organic Chemistry
Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with \(\mathrm{FeSO}_4\) in presence of concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) indicates the presence of element/s
MCQ+4 / -12024
45Practical Organic Chemistry
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 for...
MCQ+4 / -12024
46Practical Organic Chemistry
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:
MCQ+4 / -12024
47Practical Organic Chemistry
The technique used for purification of steam volatile water immiscible substances is :
MCQ+4 / -12024
48Practical Organic Chemistry
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...
MCQ+4 / -12024
49Practical Organic Chemistry
In Kjeldahl's method for estimation of nitrogen, $\mathrm{CuSO}_4$ acts as :
MCQ+4 / -12024
50Practical Organic Chemistry
Following Kjeldahl's method, $1 \mathrm{~g}$ of organic compound released ammonia, that neutralised $10 \mathrm{~mL}$ of $2 \mathrm{M} ~\mathrm{H}_2 \mathrm{SO}_4$. The percentage of nitrogen in the compound is ___________ $\%$.
INTEGER+4 / -12024