Some Basic Concepts of Organic Chemistry · Chemistry · NEET

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MCQ (Single Correct Answer)

NEET 2024
Given below are two statements: Statement I : The boiling point of three isomeric pentanes follows the order n-pentane > isopentane > neopentane State...
NEET 2024
The most stable carbocation among the following is :
NEET 2024
A compound with a molecular formula of $$\mathrm{C}_6 \mathrm{H}_{14}$$ has two tertiary carbons. Its IUPAC name is :
NEET 2024
On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of s...
NEET 2024
During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of $$\mathrm{Fe...
NEET 2023 Manipur
Which amongst the following compounds/species is least basic?
NEET 2023 Manipur
Which amongst the following compounds will show geometrical isomerism?
NEET 2023 Manipur
The correct order for the rate of $$\alpha,\beta$$-dehydrohalogenation for the following compounds is _________. ...
NEET 2023 Manipur
Given below are two statements: Statement I : In an organic compound, when inductive and electromeric effects operate in opposite directions, the indu...
NEET 2023
The number of $$\sigma$$ bonds, $$\pi$$ bonds and lone pair of electrons in pyridine, respectively are:
NEET 2023
In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with $$\mathrm{Fe}^{3+}$$ due to th...
NEET 2023
Amongst the given options which of the following molecules/ion acts as a Lewis acid?
NEET 2023
Consider the following compounds/species: The number of compounds/species which obey Huckel's rule is ___________....
NEET 2022 Phase 2
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Chlorine is an electron wit...
NEET 2022 Phase 2
Predict the order of reactivity of the following four isomers towards SN2 reaction. (I) CH3CH2CH2CH2Cl (II) CH3CH2CH(Cl)CH3 (III) (CH3)2CHCH2Cl (IV) (...
NEET 2022 Phase 2
What is the hybridization shown by C1 and C2 carbons, respectively in the given compound? OHC $$-$$ CH = CH $$-$$ CH2COOCH3...
NEET 2022 Phase 2
Which of the following is the most stable carbocation?
NEET 2022 Phase 1
Which compound amongst the following is not an aromatic compound?
NEET 2022 Phase 1
The incorrect statement regarding chirality is
NEET 2022 Phase 1
The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?
NEET 2022 Phase 1
The correct IUPAC name of the following compound is ...
NEET 2021
The compound which shows metamerism is :
NEET 2021
Dihedral angle of least stable conformer of ethane is :
NEET 2020 Phase 1
Paper chromatography is an example of :
NEET 2020 Phase 1
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
NEET 2019
The compound that is most difficult to protonate is :
NEET 2018
Which of the following molecules represents the order of hybridisation sp2 , sp2 , sp, sp from left to right atoms?
NEET 2018
Which of the following carbocations is expected to be most stable?
NEET 2017
The IUPAC name of the compound ...
NEET 2017
The correct statement regarding electrophile is
NEET 2017
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
NEET 2016 Phase 2
Which among the given molecules can exhibit tautomerism? ...
NEET 2016 Phase 1
The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is
AIPMT 2015
Which of the following statements is not correct for a nucleophile?
AIPMT 2015
The possible stereo-structures of CH3CHOHCOOH, which are optically active, are called
AIPMT 2015 Cancelled Paper
The total number of $$\pi $$-bond electrons in the following structure is ...
AIPMT 2015 Cancelled Paper
Given : Which of the given compounds can exhibit tautomerism? ...
AIPMT 2015 Cancelled Paper
Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?
AIPMT 2015 Cancelled Paper
In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure....
AIPMT 2015 Cancelled Paper
In which of the following compounds, the C$$-$$Cl bond ionisation shall give most stable carbonium ion?
AIPMT 2015 Cancelled Paper
Consider the following compounds : Hyperconjunction occurs in...
AIPMT 2015 Cancelled Paper
The enolic form of ethyl accetoacetate as shown below has ...
AIPMT 2014
In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. Th...
NEET 2013 (Karnataka)
Arrange the following in increasing order of stability ...
NEET 2013 (Karnataka)
What is the hybridisation state of benzyl carbonium ion? ...
NEET 2013 (Karnataka)
Homolytic fission of the following alkanes forms free radicals CH3 $$-$$ CH3, CH3 $$-$$ CH2 $$-$$ CH3, (CH3)2CH $$-$$ CH3, CH3 $$-$$ CH2 $$-$$CH(CH3)2...
NEET 2013 (Karnataka)
Which of the following chemical system is non aromatic ?
NEET 2013 (Karnataka)
Given : I and II are...
NEET 2013
The radical, is aromatic because it has...
NEET 2013
Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is
NEET 2013
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?
NEET 2013
The structure of isobutyl group in an organic compound is
AIPMT 2012 Prelims
Which nomenclature is not according to IUPAC system?
AIPMT 2012 Prelims
Which of the following acids does not exhibit optical isomerism?
AIPMT 2011 Mains
The IUPAC name of the following compound is ...
AIPMT 2011 Prelims
Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear ?
AIPMT 2011 Prelims
The correct IUPAC name for the compound is ...
AIPMT 2011 Prelims
Which one of the following is most reactive towards electrophilic reagent?
AIPMT 2010 Mains
The IUPAC name of the compound CH3CH$$=$$CHC$$ \equiv $$CH is
AIPMT 2010 Mains
Which of the following species is not electrophilic in nature?
AIPMT 2010 Mains
Which of the following conformers for ethylene glycol is most stable?
AIPMT 2010 Prelims
Which one of the following is most reactive towards electrophilic reagent?
AIPMT 2010 Prelims
In the following the most stable conformation of n-butane is
AIPMT 2009
The IUPAC name of the compound having the formula CH$$ \equiv $$C$$-$$CH$$=$$CH2 is
AIPMT 2008
Base strength of is in the order of...
AIPMT 2008
Which one of the following is most reactive towards electrophilic attack?
AIPMT 2008
The stability of carbanions in the following. is in the order of...
AIPMT 2008
How many stereoisomers does this molecule have? CH3CH$$=$$CHCH2CHBrCH3
AIPMT 2007
For (i) I$$-$$, (ii) Cl$$-$$, (iii) Br$$-$$, the increasing order of nucleophilicity would be
AIPMT 2007
The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) ...
AIPMT 2007
If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than
AIPMT 2006
The IUPAC name of is...
AIPMT 2005
Which one of the following pairs represents stereoisomerism?
AIPMT 2005
Which amongst the following is the most stable carbocation?
AIPMT 2005
The chirality of the compound ...
AIPMT 2005
Names of some compounds are given. Which one is not in IUPAC system?
AIPMT 2005
The best method for the separation of naphthalene and benzoic acid from their mixture is
AIPMT 2004
The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom ? ...
AIPMT 2003
Name of the compound given below is ...
AIPMT 2003
Which one of the following orders of acid strength is correct ?
AIPMT 2003
Which of the following pairs of compounds are enantiomers?
AIPMT 2002
Geometrical isomers differ in
AIPMT 2002
IUPAC name of the following is CH2 $$=$$ CH $$-$$ CH2 $$-$$ CH2 $$-$$ C $$ \equiv $$ CH
AIPMT 2001
The incorrect IUPAC name is
AIPMT 2001
In steam distillation of toluene, the pressure of toluene in vapour is
AIPMT 2001
The correct acidic order of the following is ...
AIPMT 2001
A compound of molecular formula C7H16 shows optical isomerism, compound will be

MCQ (More than One Correct Answer)

NEET 2018
Which of the following is correct with respect to – I effect of the substituents? (R = alkyl)
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