Basics of Organic Chemistry · Chemistry · JEE Main

The correct stability order of the following resonance structures of $$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$$ is ...

Total number of stereo isomers possible for the given structure : ...

Relative stability of the contributing structures is : ...

Correct order of basic strength of Pyrrole , Pyridine and Piperidine is :...

For the given compounds, the correct order of increasing $$\mathrm{pK}_{\mathrm{a}}$$ value : Choose the correct answer from the options given below ...

Methods used for purification of organic compounds are based on :

The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is: $$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}, \m...

IUPAC name of following hydrocarbon(X) is : ...

Which of the following are aromatic? ...

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

The correct arrangement for decreasing order of electrophilic substitution for above compounds is :...

The incorrect statement regarding the geometrical isomers of 2-butene is :

Functional group present in sulphonic acids is :

Which of the following is metamer of the given compound (X) ? ...

The correct nomenclature for the following compound is : ...

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Cis form of alkene is found...

Correct order of stability of carbanion is : ...

What will be the decreasing order of basic strength of the following conjugate bases? $${ }^{-} \mathrm{OH}, \mathrm{R} \overline{\mathrm{O}}, \mathrm...

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Which among the following is incorrect statement?

The set of meta directing functional groups from the following sets is :

Lassaigne's test is used for detection of :

The functional group that shows negative resonance effect is :

Ionic reactions with organic compounds proceed through : (A) homolytic bond cleavage (B) heterolytic bond cleavage (C) free radical formation (D) prim...

Which of the following compound will most easily be attacked by an electrophile?

Identify structure of 2,3-dibromo-1-phenylpentane.

The correct order of reactivity in electrophilic substitution reaction of the following compounds is : ...

A species having carbon with sextet of electrons and can act as electrophile is called

Given below are two statements: Statement I: IUPAC name of $$\mathrm{HO}-\mathrm{CH}_2-\left(\mathrm{CH}_2\right)_3-\mathrm{CH}_2-\mathrm{COCH}_3$$ is...

The correct stability order of carbocations is

Which among the following purification methods is based on the principle of "Solubility" in two different solvents?

IUPAC name of following compound is : ...

Which of the following molecule/species is most stable?

According to IUPAC system, the compound is named as...

The ascending acidity order of the following H atoms is ...

Which one of the following will show geometrical isomerism?

The interaction between $$\pi$$ bond and lone pair of electrons present on an adjacent atom is responsible for

The order of relative stability of the contributing structure is : Choose the correct answer from the options given below :...

The incorrect statement regarding conformations of ethane is :

Bond line formula of HOCH(CN)$$_2$$ is :

Which of the following is strongest Bronsted base?

Which of the following has highly acidic hydrogen?

Cyclohexene is ________ type of an organic compound....

IUPAC name of following compound (P) is: ...

Which of the following statement is correct for paper chromatography?

Given below are two statements : Statement I : Tropolone is an aromatic compound and has $$8 \pi$$ electrons. Statement II : $$\pi$$ electrons of $$ >...

Among the following compounds, the one which shows highest dipole moment is

Thin layer chromatography of a mixture shows the following observation: The correct order of elution in the silica gel column chromatography is...

The decreasing order of hydride affinity for following carbocations is: Choose the correct answer from the options given below:...

Using column chromatography, mixture of two compounds 'A' and 'B' was separated. 'A' eluted first, this indicates 'B' has

The correct IUPAC nomenclature for the following compound is: ...

The descending order of acidity for the following carboxylic acid is- A. $$\mathrm{CH}_{3} \mathrm{COOH}$$ B. $$\mathrm{F}_{3} \mathrm{C}-\mathrm{COOH...

From the figure of column chromatography given below, identify incorrect statements. A. Compound 'c' is more polar than 'a' and 'b' B. Compound '$$\m...

Resonance in carbonate ion $$\left(\mathrm{CO}_{3}{ }^{2-}\right)$$ is Which of the following is true?...

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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...

Which of the following conformations will be the most stable?

The correct order in aqueous medium of basic strength in case of methyl substituted amines is :

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Benzene is more stable than hypothe...

Which will undergo deprotonation most readily in the basic medium? ...

Given below are two statements. Statement I : The compound is optically active. Statement II : is mirror image of above compound A. In the light of ...

Arrange the following in increasing order of reactivity towards nitration A. p-xylene B. bromobenzene C. mesitylene D. nitrobenzene E. benzene Choose ...

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Thin layer chromatography is an ads...

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Among the following marked proton of which compound shows lowest $$\mathrm{pK}_{\mathrm{a}}$$ value?

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Given below are two statements: one is labelled as Assertion A and, the other is labelled as Reason R. Assertion A: [6] Annulene, [8] Annulene and cis...

The correct decreasing order of priority of functional groups in naming an organic Question: compound as per IUPAC system of nomenclature is

Which technique among the following, is most appropriate in separation of a mixture of $$100 \,\mathrm{mg}$$ of $$p$$-nitrophenol and picric acid ?...

Which of the following compounds is not aromatic?

Arrange the following in decreasing acidic strength. ...

Which of the following carbocations is most stable?

The correct IUPAC name of the following compound is : ...

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?

Which of the following structure are aromatic in nature? ...

Which of the following is most stable?

The correct order of nucleophilicity is

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : A mixture contains benzoic acid a...

Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation?

In the following structures, which on is having staggered conformation with maximum dihedral angle?

The IUPAC name of ethylidene chloride is :

Arrange the following carbocations in decreasing order of stability. ...

Which of the following is an example of conjugated diketone?

Arrange the following conformational isomers of n-butane in order of their increasing potential energy :...

Choose the correct name for compound given below :...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :Assertion (A) : A simple distillation can b...

The compound/s which will show significant intermolecular H-bonding is/are :...

Which one of the following compounds is not aromatic?

The number of stereoisomers possible for 1, 2-dimethyl cyclopropane is :

Given below are two statements :Statement I : Hyperconjugation is a permanent effect.Statement II : Hyperconjugation in ethyl cation $$\left( {C{H_3} ...

Staggered and eclipsed conformers of ethane are :

The correct order of stability of given carbocation is :...

The correct decreasing order of densities of the following compounds is :...

Which among the following is the strongest acid ?

Which one among the following resonating structures is not correct?

Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

Which of the following compounds does not exhibit resonance?

Which of the following molecules does not show stereo isomerism?

Which one of the following pairs of isomers is an example of metamerism?

Among the given species the Resonance stabilised carbocations are :...

In the following molecule,Hybridisation of Carbon a, b, and c respectively are :...

Compound with molecular formula C3H6O can show :

Nitrogen can be estimated by Kjeldahl's method for which of the following compound?

Which of the following is an aromatic 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 :

Among the following, the aromatic compounds are :Choose the correct answer from the following options :...

Given below are two statements :Statement I : A mixture of chloroform and aniline can be separated by simple distillation.Statement II : When separati...

The correct order of acid character of the following compounds is :...

Which one of the following compounds is non-aromatic?

The IUPAC name of the following compound is : ...

Which of the following compounds shows geometrical isomerism?

The increasing order of boiling points of the following compounds is : ...

The IUPAC name of the following compound is : ...

Glycerol is separated in soap industries by :

Which one of the following compounds possesses the most acidic hydrogen?

The IUPAC name for the following compound is ...

Which of the following has the shortest C-Cl bond?

The increasing order of basicity for the following intermediates is (from weak to strong) ...

Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds?

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...

The increasing order to Pkb for the following compounds will be : ...

The IUPAC name for the following compound is : ...

The increasing order of the pKb of the following compound is : ...

In chromatography, which of the following statements is incorrect for Rf ?

Which of these factors does not govern the stability of a conformation in acyclic compounds?

The increasing order of nucleophilicity of the following nucleophiles is : (a) CH3CO2$$-$$           ...

The principle of column chromatography is :

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is : ...

The correct IUPAC name of the following compound is : ...

The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is : ...

Which of the following compounds will show the maximum 'enol' content?

In the following compounds, the decreasing order of basic strength will be :

The IUPAC name of the following compound is : ...

Among the following four aromatic compounds, which one will have the lowest melting point ?

In the following compound, the favourable site/s for protonation is/are : ...

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What is the IUPAC name of the following compound ? ...

If dichloromethane (DCM) and water (H2O) are used for differential extraction, which one of the following statements is correct ?

The increasing basicity order of the following compounds is : ...

Which of the following compounds is not aromatic ?

The correct decreasing order for acid strength is :

Which amongst the following is the strongest acid ?

On treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is : ...

Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of following is a correct statement ?

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The IUPAC name of the following compound is : ...

Which of the following compounds is most reactive to an aqueous solution of sodium carbonate ?

In the following structure, the double bonds are marked as I, II, III and IV Geometrical isomerism is not possible at site (s) : ...

Which of the following compounds will show highest dipole moment ? ...

A mixture containing the following four compounds is extracted with $$1M$$ $$HCl.$$ The compound that goes to aqueous layer is : ...

Which of the following statements is not true about partition chromatography?

The IUPAC name of the following compound is : ...

Which of the following molecules is least resonance stabilized?

The hydrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :

The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :

The absolute configuration of is : ...

Which of the following compounds will exhibit geometrical isomerism?

In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is: (at. Mass...

For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphu...

The order of stability of the following carbocations : ...

Identify the compound that exhibits tautomerism.

The correct order of increasing basicity of the given conjugate bases (R = CH3) is

Out of the following, the alkene that exhibits optical isomerism is

Arrange the carbanions, $${(C{H_3})_3}\overline C $$, $$\overline C C{l_3}$$ , $${(C{H_3})_2}\overline C H$$, $${C_6}{H_5}\overline C H{}_2$$ in orde...

The number of stereoisomers possible for a compound of the molecular formula CH3 - CH = CH - CH(OH) - Me is :

The alkene that exhibits geometrical isomerism is :

The IUPAC name of neopentane is

The electrophile, $${E^ \oplus }$$ attacks the benzene ring to generate the intermediate $$\sigma - $$complex. Of the following, which $$\sigma - $$...

The absolute configuration of ...

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

...

Which of the following molecules is expected to rotate the plane of plane - polarized light?

Which one of the following conformation of cyclohexane is chiral?

Presence of a nitro group in a benzene ring

The increasing order of stability of the following free radicals is

Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is

CH3Br + Nu- $$\to$$ CH3 - Nu + Br- The decreasing order of the rate of the above reaction with nucleophiles (Nu–) A to D is [Nu– = (A) PhO–, (B) AcO–,...

The $$IUPAC$$ name of the compound shown below is : ...

Due to the presence of an unpaired electron, free radicals are:

The decreasing order of nucleophilicity among the nucleophiles ...

The reaction is fastest when $$X$$ is ...

Rate of the reaction is fastest when $$Z$$ is ...

The $$IUPAC$$ name of the compound is ...

Amongst the following compounds, the optically active alkane having lowest molecular mass is

Which of the following is the strongest base ?

Which one the following does not have sp2 hybridized carbon?

Which of the following will have meso-isomer also?

Consider the acidity of the carboxylic acids: (a) PhCOOH (b) o – NO2C6H4COOH (c) p – NO2C6H4COOH (d) m – NO2C6H4COOH Which of the following order ...

Which of the following compound is not chiral?

The IUPAC name of CH3COCH(CH3)2 is

In the anion HCOO$$-$$ the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?

The general formula CnH2nO2 could be for open chain

Among the following four structures $$i$$ to $$iv,$$ it is true that ...

Which of the following does not show geometrical isomerism?

Arrangement of (CH3)3C-, (CH3)2CH-, CH3-CH2- when attached to benzyl or an unsaturated group in increasing order of inductive effect is...

Racemic mixture is formed by mixing two

A similarity between optical and geometrical isomerism is that

Following types of compounds (as $$I, II$$ ) are studied in terms of isomerism in : ...

Which of the following compounds has wrong $$IUPAC$$ name ?

How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects? ...

Total number of aromatic compounds among the following compounds is ______. ...

The number of optically active compounds from the following is _________. ...

The number of optical isomers in following compound is : __________. ...

Number of carbocations from the following that are not stabilized by hyperconjugation is _______. ...

Using the given figure, the ratio of $$\mathrm{R}_f$$ values of sample $$\mathrm{A}$$ and sample $$\mathrm{C}$$ is $$x \times 10^{-2}$$. Value of $$x$...

The total number of 'sigma' and 'pi' bonds in 2-oxohex-4-ynoic acid is ______.

The number of different chain isomers for C$$_7$$H$$_{16}$$ is __________.

Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2-methylbutane is _______ .

Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is _______ . ...

Number of optical isomers possible for 2-chlorobutane ________.

Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is ________.

Number of geometrical isomers possible for the given structure is/are _________. ...

Total number of compounds with Chiral carbon atoms from following is _________. ...

3-Methylhex-2-ene on reaction with $$\mathrm{HBr}$$ in presence of peroxide forms an addition product (A). The number of possible stereoisomers for '$...

Among the given organic compounds, the total number of aromatic compounds is ...

Among the following, total number of meta directing functional groups is (Integer based) $$-\mathrm{OCH}_3,-\mathrm{NO}_2,-\mathrm{CN},-\mathrm{CH}_3-...

Three organic compounds A, B and $$\mathrm{C}$$ were allowed to run in thin layer chromatography using hexane and gave the following result (see figur...

The total number of chiral compound/s from the following is ______________. ...

Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound 'A' is _________ $$\t...

Optical activity of an enantiomeric mixture is $$+12.6^{\circ}$$ and the specific rotation of $$(+)$$ isomer is $$+30^{\circ}$$. The optical purity is...

Total number of isomers (including stereoisomers) obtained on monochlorination of methylcyclohexane is ___________.

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from...

The total number of monobromo derivatives formed by the alkanes with molecular formula C5H12 is (excluding stereo isomers) __________....

Observe structures of the following compounds The total number of structures/compounds which possess asymmetric carbon atoms is ______________....

Total number of possible stereoisomers of dimethyl cyclopentane is ____________.

Number of electrophilic centres in the given compound is _______________. ...

The dihedral angle in staggered form of Newman projection of 1, 1, 1-Trichloro ethane is ___________ degree. (Round off to the nearest integer)

The number of acyclic structural isomers (including geometrical isomers) for pentene are ___________

When 0.15 g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397 g of AgBr was obtained. The percentage of bromin...

Using the provided information in the following paper chromatogram :Fig : Paper chromatography for compounds A and B.the calculated Rf value of A ____...

The number of chiral carbons present in the molecule given below is _____ . ...

Which of the following is not an example of benzenoid compound?

Which one of the following compounds is aromatic in nature?

Among the following compounds, geometrical isomerism is exhibited by :