2025
NEET
MCQ
NEET 2025
Which one of the following reactions does NOT give benzene as the product?
A.
$\mathrm{H}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H} \xrightarrow[\text { at } 873 \mathrm{~K}]{\text { red hot Iron Tube }}$
B.
C.
D.
2025
NEET
MCQ
NEET 2025
Which one of the following compounds does not decolourize bromine water?
A.
B.
C.
D.
2025
NEET
MCQ
NEET 2025
Predict the major product ' $P$ ' in the following sequence of reactions-
A.
B.
C.
D.
2024
NEET
MCQ
NEET 2024 (Re-Examination)
Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula
Statement II: Oxidation of
with hydrogen peroxide in presence of $\mathrm{NaOH}$ gives propan-2ol.
In the light of the above statements, choose the most appropriate answer from the options given below:
A.
Statement I is correct but Statement II is incorrect
B.
Statement I is incorrect but Statement II is correct
C.
Both Statement I and Statement II are correct
D.
Both Statement I and Statement II are incorrect
2024
NEET
MCQ
NEET 2024 (Re-Examination)
The alkane that can be oxidized to the corresponding alcohol by KMnO$_4$ as per the equation
is, when :
A.
$\mathrm{R}_1=\mathrm{H} ; \mathrm{R}_2=\mathrm{H} ; \mathrm{R}_3=\mathrm{H}$
B.
$\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{CH}_3 ; \mathrm{R}_3=\mathrm{CH}_3$
C.
$\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{H} ; \mathrm{R}_3=\mathrm{H}$
D.
$\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{CH}_3 ; \mathrm{R}_3=\mathrm{H}$
2023
NEET
MCQ
NEET 2023
Identify product $(\mathrm{A})$ is the following reaction :
A.
B.
C.
D.
2022
NEET
MCQ
NEET 2022 Phase 2
The decreasing order of boiling points of the following alkanes is :
(a) heptane
(b) butane
(c) 2-methylbutane
(d) 2-methylpropane
(e) hexane
Choose the correct answer from the options given below :
A.
(a) > (e) > (c) > (b) > (d)
B.
(a) > (c) > (e) > (d) > (b)
C.
(c) > (d) > (a) > (e) > (b)
D.
(a) > (e) > (b) > (c) > (d)
2022
NEET
MCQ
NEET 2022 Phase 2
The products A and B in the following reaction sequence are :
A.
B.
C.
D.
2022
NEET
MCQ
NEET 2022 Phase 2
The incorrect method for the synthesis of alkenes is
A.
Treating vicinal dihalides with Zn metal
B.
Treating of alkynes with Na in liquid NH3
C.
Heating alkyl halides with alcoholic KOH
D.
Treating alkyl halides in aqueous KOH solution
2021
NEET
MCQ
NEET 2021
The correct structure of 2, 6-dimethyl-dec-4-ene is
A.
B.
C.
D.
2020
NEET
MCQ
NEET 2020 Phase 1
As alkene on ozonolysis gives methanal as one of the product, Its structure is :
A.
B.
C.
D.
2019
NEET
MCQ
NEET 2019
An alkene “A” on reaction with O3 and Zn + H2O gives propanone and ethanal in equimolar ratio. Addition
of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is :
A.
B.
C.
D.
2019
NEET
MCQ
NEET 2019
Among the following, the reaction that proceeds through an electrophilic substitution, is :
A.
B.
C.
D.
2019
NEET
MCQ
NEET 2019
The most suitable reagent for the following conversion, is :
A.
Zn / HCl
B.
Hg2+ / H+
, H2O
C.
Na / liquid NH3
D.
H2, Pd/C, quinoline
2018
NEET
MCQ
NEET 2018
Hydrocarbon (A) reacts with bromine by
substitution to form an alkyl bromide which by
Wurtz reaction is converted to gaseous
hydrocarbon containing less than four carbon
atoms. (A) is
A.
CH $ \equiv $ CH
B.
CH2 = CH2
C.
CH3 - CH3
D.
CH4
2017
NEET
MCQ
NEET 2017
Which one is the correct order of acidity?
A.
CH$ \equiv $CH > CH3 $-$C$ \equiv $CH
> CH2 $=$ CH2 > CH3$-$CH3
> CH2 $=$ CH2 > CH3$-$CH3
B.
CH $ \equiv $ CH > CH2 $=$ CH2
> CH3$-$C $ \equiv $ CH > CH3 $-$CH3
> CH3$-$C $ \equiv $ CH > CH3 $-$CH3
C.
CH3$-$CH3 > CH2 $=$ CH2
> CH3 $-$C $ \equiv $ CH > CH$ \equiv $CH
> CH3 $-$C $ \equiv $ CH > CH$ \equiv $CH
D.
CH2$=$CH2 > CH3 $-$ CH $=$ CH2
> CH3 $-$ C$ \equiv $ CH > CH $ \equiv $ CH
> CH3 $-$ C$ \equiv $ CH > CH $ \equiv $ CH
2017
NEET
MCQ
NEET 2017
Predict the correct intermediate and product in the following reaction :
${H_3}C - C \equiv CH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HgS{O_4}}^{{H_2}O,{H_2}S{O_4}}} \mathop {Intermediate}\limits_{(A)} \to \mathop {\Pr oduct}\limits_{(B)} $
${H_3}C - C \equiv CH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HgS{O_4}}^{{H_2}O,{H_2}S{O_4}}} \mathop {Intermediate}\limits_{(A)} \to \mathop {\Pr oduct}\limits_{(B)} $
A.
B.
C.
D.
2017
NEET
MCQ
NEET 2017
With respect to the conformers of ethane, which of the following statements is true?
A.
Bond angle changes but bond length remains same.
B.
Both bond angle and bond length change.
C.
Both bond angle and bond length remain same.
D.
Bond angle remains same but bond length changes.
2016
NEET
MCQ
NEET 2016 Phase 2
In pyrrole the electron density is maximum on
A.
2 and 3
B.
3 and 4
C.
2 and 4
D.
2 and 5
2016
NEET
MCQ
NEET 2016 Phase 2
Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?
A.
B.
C.
D.
2016
NEET
MCQ
NEET 2016 Phase 2
In which of the following molecules, all atoms are coplanar?
A.
B.
C.
D.
2016
NEET
MCQ
NEET 2016 Phase 2
In the given reaction,
the product P is
the product P is
A.
B.
C.
D.
2016
NEET
MCQ
NEET 2016 Phase 2
Which of the following can be used as the halide component for Friedel-Crafts reaction?
A.
Chlorobenzene
B.
Bromobenzene
C.
Chloroethene
D.
Isopropyl chloride
2016
NEET
MCQ
NEET 2016 Phase 2
The compound that will react most readily with gaseous bromine has the formula
A.
C3H6
B.
C2H2
C.
C4H10
D.
C2H4
2016
NEET
MCQ
NEET 2016 Phase 1
For the following reactions :
(A) CH3CH2CH2Br + KOH $ \to $
CH3CH $=$ CH2 + KBr + H2O
Which of the following statements is correct?
(A) CH3CH2CH2Br + KOH $ \to $
CH3CH $=$ CH2 + KBr + H2O
Which of the following statements is correct?
A.
(A) is elimination, (B) and (C) are substitution reactions.
B.
(A) is substitution, (B) and (C) are addition reactions.
C.
(A) and (B) are elimination reactions and (C) is addition reaction.
D.
(A) is elimination, (B) is substitution and (C) is addition reaction.
2016
NEET
MCQ
NEET 2016 Phase 1
The pair of electrons in the given carbanion, CH3C $ \equiv $ C$-$, is present in which of the following orbitals?
A.
sp2
B.
sp
C.
2p
D.
sp3
2016
NEET
MCQ
NEET 2016 Phase 1
Consider the nitration of benzene using mixed conc.H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be
A.
unchanged
B.
doubled
C.
faster
D.
slower
2016
NEET
MCQ
NEET 2016 Phase 1
In the reaction
X and Y are
X and Y are
A.
X = 2-Butyne, Y = 2-Hexyne
B.
X = 1-Butyne, Y = 2-Hexyne
C.
X = 1-Butyne, Y = 3-Hexyne
D.
X = 2-Butyne, Y = 3-Hexyne
2015
NEET
MCQ
AIPMT 2015
Which of the following is not the product of dehydration of
A.
B.
C.
D.
2015
NEET
MCQ
AIPMT 2015
In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule to give a product 1-chloro-1 methylcyclohexane. The possible alkene is
A.
B.
C.
(A) and (B)
D.
2015
NEET
MCQ
AIPMT 2015
2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?
A.
(CH3)3CCH $=$ CH2
B.
(CH3)2C $=$ CHCH2CH3
C.
(CH3)2CHCH2CH $=$ CH2
D.
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
A single compound of the structure,
is obtainable from ozonolysis of which of the following cyclic compounds?
is obtainable from ozonolysis of which of the following cyclic compounds?
A.
B.
C.
D.
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
Given :
The enthalpy of hydrogenation of these compounds will be in the order as
The enthalpy of hydrogenation of these compounds will be in the order as
A.
II > III > I
B.
II > I > III
C.
I > II > III
D.
III > II > I
2014
NEET
MCQ
AIPMT 2014
Identify Z in the sequence of reactions :
A.
CH3 $-$(CH2)3 $-$ O $-$ CH2CH3
B.
(CH3)2CH $-$ O $-$ CH2CH3
C.
CH3(CH2)4 $-$ O $-$ CH3
D.
CH3CH2 $-$ CH(CH3) $-$ O $-$ CH2CH3
2014
NEET
MCQ
AIPMT 2014
Which of the following organic compounds has same hybridization as its combustion product (CO2)?
A.
Ethane
B.
Ethyne
C.
Ethene
D.
Ethanol
2014
NEET
MCQ
AIPMT 2014
What products are formed when the following compound is treated with Br2 in the presence of FeBr3?
A.
B.
C.
D.
2013
NEET
MCQ
NEET 2013 (Karnataka)
In the following reaction :
Product 'P' will not give
Product 'P' will not give
A.
Tollen's reagent test
B.
Brady's reagent test
C.
Victor Meyer test
D.
Iodoform test
2013
NEET
MCQ
NEET 2013
Which of the following compounds will not undergo Friedal-Craft's reaction easily?
A.
Nitrobenzene
B.
Toluene
C.
Cumene
D.
Xylene
2012
NEET
MCQ
AIPMT 2012 Mains
Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?
A.
NaNH2
B.
HCl
C.
O2
D.
Br2
2012
NEET
MCQ
AIPMT 2012 Prelims
Among the following compounds the one that is most reactive towards electrophilic nitration is
A.
benzoic acid
B.
nitrobenzene
C.
toluene
D.
benzene
2012
NEET
MCQ
AIPMT 2012 Prelims
In the following reaction
The major product is
The major product is
A.
B.
C.
D.
2010
NEET
MCQ
AIPMT 2010 Prelims
Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by
A.
oxidation
B.
cracking
C.
distillation under reduced pressure
D.
hydrolysis
2010
NEET
MCQ
AIPMT 2010 Prelims
The reaction of toluene with Cl2 in presence of FeCl3 gives X and reaction in presence of light gives Y. Thus, X and Y are
A.
X = Benzal chloride, Y = o-chlorotoluene
B.
X = m-chloroluene, Y = p-chlorotoluene
C.
X = o- and p-chlorotoluene,
Y = Trichloromethyl benzene
D.
X = Benzyl chloride, Y = m-chlorotoluene
2010
NEET
MCQ
AIPMT 2010 Prelims
In a set of reactions, ethylbenzene yielded a product D.
D would be
D would be
A.
B.
C.
D.
2009
NEET
MCQ
AIPMT 2009
The state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon,
is in the following sequence
is in the following sequence
A.
sp3, sp2, sp2 and sp
B.
sp, sp2, sp2 and sp3
C.
sp, sp2, sp3 and sp2
D.
sp, sp3, sp2 and sp3
2009
NEET
MCQ
AIPMT 2009
Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
A.
Butanol
B.
2-Butyne
C.
2-Butenol
D.
2-Butene
2009
NEET
MCQ
AIPMT 2009
Benzene reacts with CH3Cl in the presence of anhydrons AlCl3 to form
A.
chlorobenzene
B.
benzyl chloride
C.
xylene
D.
toluene.
2008
NEET
MCQ
AIPMT 2008
A (predominantly) is
A.
B.
C.
D.
2008
NEET
MCQ
AIPMT 2008
In the hydrocarbon,
The state of hybridization of carbons 1, 3 and 5 are in the following sequence
The state of hybridization of carbons 1, 3 and 5 are in the following sequence
A.
sp, sp2, sp3
B.
sp3, sp2, sp
C.
sp2, sp, sp3
D.
sp, sp3, sp2
2007
NEET
MCQ
AIPMT 2007
Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?
A.
3-Methyl- 1 -butene
B.
Cyclopentane
C.
2-Methyl-1-butene
D.
2-Methyl-2-butene
