Basics of Organic Chemistry

Total number of possible stereoisomers of dimethyl cyclopentane is ____________.

Which of the following is most stable?

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

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-[10] Annulene, are respectively aromatic, not-aromatic and aromatic.

Reason R: Planarity...

Match List - I with List - II.

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The correct order of nucleophilicity is

Which of the following compounds is not aromatic?

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

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

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

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

The IUPAC name of ethylidene chloride is :

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

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

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 and napthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason R ...

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

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of Rf values of A...

Arrange the following in decreasing acidic strength.

Number of electrophilic centres in the given compound is _______________.

Which of the following is an example of conjugated diketone?

Arrange the following carbocations in decreasing order of stability.

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 be used to separate a mixture of propanol and propanone.Reason (R) : Two liquids with a dif...

Choose the correct name for compound given below :

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

The correct order of stability of given carbocation is :

Staggered and eclipsed conformers of ethane are :

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

Given below are two statements :Statement I : Hyperconjugation is a permanent effect.Statement II : Hyperconjugation in ethyl cation \(\left( {C{H_3} - \mathop C\limits^ + {H_2}} \right)\) involves the overlapping of $${C_{s{p^2}}} - {H_{1...

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

Given below are two statements :Statement I : A mixture of chloroform and aniline can be separated by simple distillation.Statement II : When separating aniline from a mixture of aniline and water by steam distillation aniline boils below i...

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

Which one of the following compounds is not aromatic?

Which one among the following resonating structures is not correct?

Which among the following is the strongest acid ?

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

Using the provided information in the following paper chromatogram :Fig : Paper chromatography for compounds A and B.the calculated Rf value of A ________\(\times\) 10-1.

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

Which one of the following compounds is non-aromatic?

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

Which of the following molecules does not show stereo isomerism?

Which of the following compounds does not exhibit resonance?

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

Among the given species the Resonance stabilised carbocations 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 bromine in the organic compound is ______________. (Nearest integer)[Atomic mass : Silver = 108,...

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

Which one of the following compounds is aromatic in nature?

Compound with molecular formula C3H6O can show :

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

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 remains constant in all solvents.Choose the most appropriate answer from the options given below...