General Organic Chemistry — JEE Main PYQs

From the following, the least stable structure is:

Identify correct statement from the following:

A. Propanal and propanone are functional isomers.
B. Ethoxyethane and methoxypropane are metamers.
C. But-2-ene shows optical isomerism.
D. But-1-ene and but-2-ene are functional isomers.
E. Pentane and 2, 2-dimethyl propane are cha …

Match List-I with List-II.

List-I (Pair of Compounds):
A. 2-Methylpropene and but-1-ene
B. Cis-but-2-ene and trans-but-2-ene
C. 2-Butanol and diethyl ether
D. But-1-ene and but-2-ene

List-II (Type of Isomers):
I. Stereoisomers
II. Position isomers
III. Chain isomers
IV. Functio …

Given below are two statements:

Statement-I: Compound (X), shown below, dissolves in ${\mathrm{NaHCO}}_3$ solution and has two chiral carbon atoms

Statement-II: Compound (Y), shown below, has two carbons with ${\mathrm{sp}}^3$ hybridization, one carbon with ${\mathrm{sp}}^2$ an …

The IUPAC name of the following comopound is :

Consider all the structural isomers with molecular formula $\mathrm{C}{}_5\mathrm{H}{}_{11}\mathrm{Br}$ are separately treated with KOH (aq) to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is ____ .

Given below are two statements:

Statement I: ${\left({\mathrm{CH}}_3\right)}_3\stackrel{\oplus }{\mathrm{C}}$ is more stable than $\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_3$ as nine hyperconjugation interactions are possible in …

Arrange the following carbanions in the decreasing order of stability
I. $p-\mathrm{Br}-{\mathrm{C}}_6{\mathrm{H}}_4-\stackrel{\ominus }{\mathrm{C}}{\mathrm{H}}_2$
II. ${\mathrm{C}}_6{\mathrm{H}}_5-\stackrel{\ominus }{\stackrel{\ominus }{\mathrm{C}}}{\mathrm{H}}_2$
III. …

Find out the statements which are not true.
A. Resonating structure with more number of covalent bonds and lesser charge separation are more stable.
B. In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile.
C. Inductive eff …

Given below are two statements:

Statement I: There are several conformers for n-butane. Out of those conformers, the least stable and most stable conformer is

Statement II: As the dihedral angle increases, torsional strain decreases from (X) to (Y).

In the light of the above s …

CORRECT order of stability for the following is ${\mathrm{CH}}_2={\mathrm{CH}}^{-},{\mathrm{CH}}_3-{\mathrm{CH}}_2^{-},\mathrm{CH}\equiv {\mathrm{C}}^{-}$

The cyclic cations having the same number of hyperconjugation are :
A. (see structure)
B. (see structure)
C. (see structure)
D. (see structure)

Choose the correct answer from the options given below :

In IUPAC nomenclature, the correct order of decreasing priority of functional group is:

Increasing order of electron withdrawing power of following functional groups is :
a. -CN
b. -COOH
c. $-{\mathrm{NO}}_2$
d. -I

Given below are two statements:

Statement I: In

the carbocation is stabilised by +R effect of $-{\mathrm{OCH}}_3$ group.

Statement II : In

the carbanion is stabilised by -R effect of $-{\mathrm{NO}}_2$ group.

In the light of the above statements, choose the correct answe …

The following structures are

Given below are two statements :

Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is ${\mathrm{CH}}_3^{-}>{\mathrm{CH}}_3-{\mathrm{CH}}_2^{-}>({\mathrm{CH}}_3{)}_2{\mathrm{CH}}^{-}>({\mathrm{CH}}_3{)}_3{\mathrm{C}}^{-}$.
Statement II : All …

IUPAC name of the some alkenes are given below :

Find out the correct stability order.
A. 2-Methylbut-2-ene
B. cis-But-2-ene
C. 2,3-Dimethylbut-2-ene
D. Prop-1-ene

Choose the correct answer from the options given below:

Identify the correct IUPAC name of hydrocarbon (x) containing three primary carbon atoms and with molar mass 72 g mol⁻¹.

Given below are two statements:

Statement-I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers.

Statement-II : 2, 2, 6, 6-tetramethylcyclohexanone exhibits keto-enol tautomerism.

In the light of the above statements, choose the correct answer from th …

The total number of aromatic compounds/species from the following is

How many different stereoisomers are possible for the given molecule?

The IUPAC name of the following compound is :

The incorrect statements regarding geometrical isomerism are :
(A) Propene shows geometrical isomerism.
(B) Trans isomer has identical atoms/groups on the opposite sides of the double bond.
(C) Cis-but-2-ene has higher dipole moment than trans-but-2-ene.
(D) 2-methylbut-2-ene sho …

The most stable carbocation from the following is :

Which one of the carbocations from the following is most stable?

The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ____ .

The correct stability order of the following species/molecules is :

p:

q:

r:

A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q") ("Q") on ozonolysis followed by reflux under alkaline condition gives (" R "). The structure of (" R ") is given below :
(see structure)

The structure of (" $\mathbf{P}$ ") is

The correct order of stability of following carbocations is :

Given below are two statements :

Statement (I) :
(see structures)
and
(see structure)
isomeric compounds.

Statement (II) :
(see structure)
and
(see structure)
are functional group isomers.

In the light of the above statements, choose the correct answer from the options given b …

Total number of nucleophiles from the following is :
${\mathrm{NH}}_3,\mathrm{PhSH},{\left({\mathrm{H}}_3\mathrm{C}\right)}_2\mathrm{S},{\mathrm{H}}_2\mathrm{C}={\mathrm{CH}}_2,\stackrel{\ominus }{\mathrm{O}}\mathrm{H},{\mathrm{H}}_3{\mathrm{O}}^{\oplus }$, …

Designate whether each of the following compounds is aromatic or not aromatic.
(a) (see structure)
(b) (see structure)
(c) (see structure)
(d) (see structure)
(e) (see structure)
(f) (see structure)
(g) (see structure)
(h) (see structure)

Consider the following compound (X)

The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding $\mathrm{C}-\mathrm{H}$ bond are :

Identify the correct statements from the following
A. (see structures) are metamers
B. (see structures) are functional isomers
C. (see structures) are position isomers
D. (see structures) are homologous
Choose the correct answer from the options given below

The least acidic compound, among the following is:

In which pairs, the first ion is more stable than the second?
(A)
&
(B)
&
(C)
&
(D)
&

The IUPAC name of the following compound is -

Given below are two statements.

Statement I : The dipole moment of $\stackrel{4}{\mathrm{CH}}-\stackrel{3}{\mathrm{CH}}=\stackrel{2}{\mathrm{CH}}-\stackrel{1}{\mathrm{CH}}=\mathrm{O}$ is greater than (see structure)

Statement II: …

Mixture of 1 g each of chlorobenzene, aniline and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel, 5 M NaOH ( 30 mL ) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel conta …

Which of the following is the correct IUPAC name of given organic compound (X) ?

(see structure)

What is the correct IUPAC name of (see structure) ?

Identify (B) and (C) and how are (A) and (C) related?

Which among the following is incorrect statement?

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

Correct order of stability of carbanion is

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $\pi$ electrons is ____

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 to be more polar than the trans form
Reason (R): Dipole moment of trans isomer of 2-butene is zero.

In the light of the above sta …

The correct nomenclature for the following compound is:

Match List - I with List - II.

List - I (Pair of Compounds)
(A) n-propanol and Isopropanol
(B) Methoxypropane and ethoxyethane
(C) Propanone and propanal
(D) Neopentane and Isopentane

List - II (Isomerism)
(I) Metamerism
(II) Chain Isomerism
(III) Position Isomerism
(IV) Functi …