Some Basic Concepts of Organic Chemistry · Chemistry · NEET

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

A steam volatile organic compound which is immiscible with water has a boiling point of $$250^{\circ} \mathrm{C}$$. During steam distillation, a mixtu...

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Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to

Given below are two statements: Statement I : The boiling point of three isomeric pentanes follows the order n-pentane > isopentane > neopentane State...

The most stable carbocation among the following is :

A compound with a molecular formula of $$\mathrm{C}_6 \mathrm{H}_{14}$$ has two tertiary carbons. Its IUPAC name is :

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of s...

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of $$\mathrm{Fe...

Which amongst the following compounds/species is least basic?

Which amongst the following compounds will show geometrical isomerism?

The correct order for the rate of $$\alpha,\beta$$-dehydrohalogenation for the following compounds is _________. ...

Given below are two statements: Statement I : In an organic compound, when inductive and electromeric effects operate in opposite directions, the indu...

The number of $$\sigma$$ bonds, $$\pi$$ bonds and lone pair of electrons in pyridine, respectively are:

In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with $$\mathrm{Fe}^{3+}$$ due to th...

Amongst the given options which of the following molecules/ion acts as a Lewis acid?

Consider the following compounds/species: The number of compounds/species which obey Huckel's rule is ___________....

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Chlorine is an electron wit...

Predict the order of reactivity of the following four isomers towards SN2 reaction. (I) CH3CH2CH2CH2Cl (II) CH3CH2CH(Cl)CH3 (III) (CH3)2CHCH2Cl (IV) (...

What is the hybridization shown by C1 and C2 carbons, respectively in the given compound? OHC $$-$$ CH = CH $$-$$ CH2COOCH3...

Which of the following is the most stable carbocation?

Which compound amongst the following is not an aromatic compound?

The incorrect statement regarding chirality is

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

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

The compound which shows metamerism is :

Dihedral angle of least stable conformer of ethane is :

Paper chromatography is an example of :

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?

The compound that is most difficult to protonate is :

Which of the following molecules represents the order of hybridisation sp2 , sp2 , sp, sp from left to right atoms?

Which of the following carbocations is expected to be most stable?

The IUPAC name of the compound ...

The correct statement regarding electrophile is

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is

Which among the given molecules can exhibit tautomerism? ...

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is

The possible stereo-structures of CH3CHOHCOOH, which are optically active, are called

Which of the following statements is not correct for a nucleophile?

The total number of $$\pi $$-bond electrons in the following structure is ...

Given : Which of the given compounds can exhibit tautomerism? ...

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?

In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure....

The enolic form of ethyl accetoacetate as shown below has ...

In which of the following compounds, the C$$-$$Cl bond ionisation shall give most stable carbonium ion?

Consider the following compounds : Hyperconjunction occurs in...

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. Th...

Given : I and II are...

Which of the following chemical system is non aromatic ?

Homolytic fission of the following alkanes forms free radicals CH3 $$-$$ CH3, CH3 $$-$$ CH2 $$-$$ CH3, (CH3)2CH $$-$$ CH3, CH3 $$-$$ CH2 $$-$$CH(CH3)2...

What is the hybridisation state of benzyl carbonium ion? ...

Arrange the following in increasing order of stability ...

The radical, is aromatic because it has...

Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?

The structure of isobutyl group in an organic compound is

Which nomenclature is not according to IUPAC system?

Which of the following acids does not exhibit optical isomerism?

The IUPAC name of the following compound is ...

Which one of the following is most reactive towards electrophilic reagent?

The correct IUPAC name for the compound is ...

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear ?

Which of the following species is not electrophilic in nature?

The IUPAC name of the compound CH3CH$$=$$CHC$$ \equiv $$CH is

Which of the following conformers for ethylene glycol is most stable?

Which one of the following is most reactive towards electrophilic reagent?

In the following the most stable conformation of n-butane is

The IUPAC name of the compound having the formula CH$$ \equiv $$C$$-$$CH$$=$$CH2 is

How many stereoisomers does this molecule have? CH3CH$$=$$CHCH2CHBrCH3

The stability of carbanions in the following. is in the order of...

Which one of the following is most reactive towards electrophilic attack?

Base strength of is in the order of...

If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than

For (i) I$$-$$, (ii) Cl$$-$$, (iii) Br$$-$$, the increasing order of nucleophilicity would be

The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) ...

The IUPAC name of is...

The best method for the separation of naphthalene and benzoic acid from their mixture is

Which amongst the following is the most stable carbocation?

Which one of the following pairs represents stereoisomerism?

The chirality of the compound ...

Names of some compounds are given. Which one is not in IUPAC system?

The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom ? ...

Which of the following pairs of compounds are enantiomers?

Name of the compound given below is ...

Which one of the following orders of acid strength is correct ?

IUPAC name of the following is CH2 $$=$$ CH $$-$$ CH2 $$-$$ CH2 $$-$$ C $$ \equiv $$ CH

Geometrical isomers differ in

A compound of molecular formula C7H16 shows optical isomerism, compound will be

The correct acidic order of the following is ...

In steam distillation of toluene, the pressure of toluene in vapour is

The incorrect IUPAC name is

Which of the following is correct with respect to – I effect of the substituents? (R = alkyl)