JEE General Organic Chemistry PYQs with Solutions PDF

Given below are four compounds :
(a) n-propyl choride
(b) iso-propyl chloride
(c) sec-butyl chloride
(d) neo-pentyl chloride
Percentage of carbon in the one which exhibits optical isomerism is:

Match List - I with List - II.

Choose the correct answer from the options given below :

From the following, the least stable structure is :

80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling to 273 K occupy 224 mL. When the system is treated with KOH solution, the volume decreases to 64 ml. The formula of the hydrocarbon is:

Identify correct statements 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 ai-e chain isomers.
Choose the correct answer from the options given below:

The IUPAC name of the following compound is :

Arrange the following carbanions in the decreasing order of stability.

Choose the correct answer from the options given below:

Given below are two statements:
Statement I: There are several conformers for n-butane. Out of those conformers,

is 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 statements, choose the correct answer from the options given below

0.53 g of an organic compound (x) when heated with excess of nitric acid ( concentrated) and then with silver nitrate gave 0. 75 g of silver bromide precipitate. 1.0 g of (x) gave 1.32 g of $$CO_{2}$$ gas on combustion. The percentage of hydrogen in the compound (x) is __ %. [Nearest Integer]
[Given: Molar mass in g $$mol^{-1}$$ H : 1, C : 12, Br: 80, Ag: 108, O : 16 ; Compound (x) :$$C_{x}H_{y}Br_{z}$$]

Given below are two statements:

Statement I: $$(CH_3)_3C^+$$ is more stable than $$CH_3^+$$ as nine hyperconjugation interactions are possible in $$(CH_3)_3C^+$$.
Statement II: $$CH_3^+$$ is less stable than $$(CH_3)_3C^+$$ as only three hyperconjugation interactions are possible in $$CH_3^+$$.

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

The cyclic cations having the same number of hyperconjugalion are :
A.

B.

C.

D.

Choose the correct answer from the options given below :

The most stable carbocation from the following is :

How many different stereoisomers are possible for the given molecule?

The IUPAC name of the following compound is :

In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl . The percentage composition of chlorine in the compound is _______ \%. (Given : molar mass in $$gmol^{-1} \text{ of } Ag: 108, Cl: 35.5$$)

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

$$\text{Identify correct statement/s : }(A) -OCH_3 \text{ and } -NHCOCH_3 \text{ are activating groups. } (B)-CN \text{ and } -OH \text{ are meta directing groups. } (C) -CN \text{ and } -SO_3H$$ are meta directing groups.  $$(D)$$ Activating groups act as ortho- and para-directing groups.  $$(E)$$ Halides are activating groups. Choose the correct answer from the options given below:

In the given structure, the number of $$sp \text{ and } sp^2 $$ hybridized carbon atoms present respectively are:

$$\text{The possible number of stereoisomers for 5-phenylpent -4-en-2-ol is } \underline{\hspace{2cm}}.$$

The hydrocarbon  $$(X)$$  with molar mass  $$80\,g\,mol^{-1}$$ and  $$90\% $$ carbon has $$\underline{\hspace{2cm}}$$  degree of unsaturation.

The correct order of stability of following carbocations is :

Total number of nucleophiles from the following is :
$$NH_{3},PhSH,(H_{3}C)_{2}S,H_{2}C=CH_{2},\ominus\\O H,H_{3}O^{\oplus},(CH_{3})_{2}CO,\rightleftharpoons NCH_{3}$$

Match List - I with List - II.

Choose the correct answer from the options given below :

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

Match List I with List II :

Choose the correct answer from the options given below :

Which among the following is incorrect statement?

Given below are two statements : Statement (I) :

are isomeric compounds. Statement (II) :

are functional group isomers.

Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical formation (D) Primary free radical (E) Secondary free radical. Choose the correct answer from the options given below:

Number of optical isomers possible for 2-chlorobutane is:

The functional group that shows negative resonance effect is:

IUPAC name of the following compound (P) is :

Cyclohexene is _________ type of an organic compound.

Bond line formula of $$HOCH(CN)_2$$ is :

The order of relative stability of the contributing structures is :

Choose the correct answer from the options given below:

The incorrect statement regarding conformations of ethane is :

Total number of compounds with Chiral carbon atoms from following is

$$CH_3-CH_2-CHNO_2-COOH$$

$$CH_3-CH(I)-CH_2-NO_2$$

$$CH_3-CH_2-CHBr-CH_2-CH_3$$

$$CH_3-CH_2-CH(OH)-CH_2OH$$

The interaction between $$\pi$$ bond and lone pair of electrons present on an adjacent atom is responsible for

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is:

Number of compounds among the following which contain sulphur as heteroatom is _______.
Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

According to IUPAC system, the compound is named as:

The ascending acidity order of the following H atoms is

Match List I with List II

Choose the correct answer from the options given below:

Which one of the following will show geometrical isomerism?

The total number of 'Sigma' and Pi bonds in 2-formylhex-4-enoic acid is ______.

Which of the following molecule/species is most stable?

IUPAC name of the following compound is:

The correct stability order of carbocations is

Number of geometrical isomers possible for the given structure is/are ________.

2-chlorobutane + $$Cl_2 \rightarrow C_4H_8Cl_2$$ (isomers)
Total number of optically active isomers shown by $$C_4H_8Cl_2$$, obtained in the above reaction is ________.

A species having carbon with sextet of electrons and can act as electrophile is called