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Chemistry
Practical Organic Chemistry
Previous Years Questions

Given below are two statements : Statement I : Sulphanilic acid gives esterification test for carboxyl group. Statement II : Sulphanilic acid gives re...
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : An aqueous solution of $$\ma... Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family... In Dumas method for the estimation of \mathrm{N}_{2}, the sample is heated with copper oxide and the gas evolved is passed over : Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil... Compound that will give positive Lassaigne's test for both nitrogen and halogen is : Given below are two statements: one is labelled as Assertion$$\mathbf{A}$$and the other is labelled as Reason$$\mathbf{R}$$. Assertion A: Phenolpht... Which technique among the following, is most appropriate in separation of a mixture of$$100 \,\mathrm{mg}$$of$$p$$-nitrophenol and picric acid ?... In base vs. acid titration, at the end point methyl orange is present as Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family... Given below are two statements : Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocy... Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation? During the qualitative analysis of salt with cation y2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. Th... Sodium stearate CH3(CH2)16COO$$-$$Na+ is an anionic surfactant which forms micelles in oil.Choose the correct statement for it from the following :... Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)? When silver nitrate solution is added to potassium iodide solution then the sol produced is : Nitrogen can be estimated by Kjeldahl's method for which of the following compound? Given below are two statements :Statement I : Retardation factor (Rf) can be measured in meter/centimeter.Statement II : Rf value of a compound remain... In chromotography technique, the purification of compound is independent of : On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respe... Given below are two statements :Statement I : The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH. Statement II : ... Given below are two statements : Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II : Cuprou... A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63oC while the other boils at 60oC What is the best way to se... A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of (A) benzanilide (B) ani... A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO3 ... The principle of column chromatography is The organic compound that gives following qualitative analysis is : .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Ar... An organic compound 'X' showing the following solubility profile is : ... An organic compound neither reacts with natural ferric chloride solution nor with fehling solution. it however, reacts with Grignard reagent and gives... The correct match between Item I and Item II is : .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-serif;fo... The correct match between item 'I' and item 'II' is : .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-ser... If dichloromethane (DCM) and water (H2O) are used for differential extraction, which one of the following statements is correct ? The correct match between Item-I and Item-II is : .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg td{font-family:Arial, sans-serif... For standardizing NaOH solution, which of the following is used as a primary standard ? In a complexometric titration of metal ion with ligand M(Metal ion) + L(Ligand)$$ \to $$C(Complex) end point is estimated spectrophoto - metricall... An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination? The correct match between items of List-I and List-II is : .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;fon... A solution containing a group-IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil.HCl produces a white precipitate wit... The most appropriate method of making egg-albumin sol is : Which of the following reagents may be used to distinguish between phenol and benzoic acid ? Biuret test is not given by The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is ## Numerical A sample of$$0.125 \mathrm{~g}$$of an organic compound when analyzed by Duma's method yields$$22.78 \mathrm{~mL}$$of nitrogen gas collected over ... In the above reaction,$$5 \mathrm{~g}$$of toluene is converted into benzaldehyde with$$92 \%$$yield. The amount of benzaldehyde produced is _____... The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from... While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from$$0.25 \mathrm{~g}$$of the compound neutr... An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is __________... Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound neutralised 12.5 mL ... 0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compo... How many of the given compounds will give a positive Biuret test ____________ ? Glycine, Glycylalanine, Tripeptide, Biuret The transformation occurring in Duma's method is given below :$${C_2}{H_7}N + \left( {2x + {y \over 2}} \right)CuO \to xC{O_2} + {y \over 2}{H_2}O + {...
The number of moles of CuO, that will be utilized in Dumas method for estimation nitrogen in a sample of 57.5 g of N, N-dimethylaminopentane is ______...
In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg pressure. The p...
Using the provided information in the following paper chromatogram :Fig : Paper chromatography for compounds A and B.the calculated Rf value of A ____...
1.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purifica...
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