Chemistry Quiz

Chemistry Quiz for NEET, JEE, GATE, SLET, CSIR:NET/JRF

Daily Chemistry Quiz

This Chemistry quiz is very important for Board, Academic and Competitive exams like NEET, IIT-JEE, IIT-JAM, GATE, SLET, CSIR:NET/JRF, DRDO, TIFR, IISc., Pre Ph.D. Test, University Entrance exams, other exams. You must participate this daily quiz and improve your knowledge for upcoming exams.

× 13.5.2024

The major product of the given reaction is-

Organic Chemistry MCQ for NEET and IIT-JEE
Answer

Option D is correct answer.

Mechanism

Mechanism aromatization M.S.Chauhan

× 14.5.2024

The correct product of the given reaction is-

CSIR DEC 2012 Reaction Mechanism

Answer

Option C is correct answer.

Mechanism

CSIR DEC 2012 Reaction Mechanism

× 15.5.2024

The major product of the given reaction is-

GATE 2011 Organic Chemistry Question


Answer

Option B is correct answer.

Mechanism

GATE 2011 Organic Chemistry Question

× 16.5.2024

Which of the following is correct product of the given reaction-

Epoxidation of Alkene with mCPBA followed by BF3-Et2O CSIR JUNE 2012


Answer

Option D is correct answer.

Mechanism

Epoxidation of Alkene with mCPBA followed by BF3-Et2O CSIR JUNE 2012

× 17.5.2024

Which of the following is correct product of the given reaction-

Wharton Reaction


Answer

Option A is correct answer.

Mechanism

Wharton Reaction Mechanism

× 18.5.2024

Which of the following is correct product of the given reaction-

Organic Reaction CSIR NET JRF


Answer

Option B is correct answer.

Mechanism

Organic Reaction CSIR NET JRF

× 19.5.2024

Dehydration of Isoborneol gives the Product-

Dehydration of isoborneol


Answer

Option D is correct answer.

Mechanism

This mechanism go through Wagner-Meerwein Rearrangement.
Dehydration of isoborneol

× 20.5.2024

The character table for the D3 point group is provided below:

For D3 point group, the correct statement among the following is_ CSIR JUNE 2016
For this point group, the correct statement among the following is:
A. It is possible to have a totally symmetric normal mode of vibration which is IR- active.
B. All IR-active normal modes are necessarily Raman inactive.
C. All Raman-active normal modes are necessarily IR-active.
D. It is possible to have a pair of IR-active normal modes that are degenerate.


Answer

Option D is correct answer.

From the table it is clear that
Option A is incorrect because IR-active mode is either A2 or E both are not totally symmetric.
Option B is incorrect because IR-active mode is either A2 or E but E is Raman inactive (4th quadrant of A2 is blank so Raman inactive)
Option C is incorrect because A1 is Raman active.

× 21.5.2024

Which of the following is correct product of the given reaction-

CSIR JUNE 2016 Organic Chemistry Question


Answer

Option A is correct answer.

Mechanism
It is a Shapiro reaction. Tosyl hydrozone give less hindered vinyl lithium which give α,β-unsaturated aldehyde with DMF.
CSIR JUNE 2016 Organic Chemistry Question Mechanism

× 22.5.2024

Which of the following is correct product of the given reaction-

Reaction of Cyanobenene with Grignard Reagent


Answer

Option B is correct answer.

Mechanism

Reaction of Cyanobenene with Grignard Reagent Mechanism

× 23.5.2024

Which of the following is correct product of the given reaction-

Intramolecular Aldol Reaction


Answer

Option B is correct answer.

Mechanism

Intramolecular Aldol Reaction Mechanism

× 24.5.2024

Which of the following is correct product of the given reaction-

[3,3] cope rearrangement


Answer

Option C is correct answer.

Mechanism

[3,3] cope rearrangement Mechanism

× 25.5.2024

Ground state term symbol for [Cr(CN)6]−4 is

A. 2P
B. 3D
C. 3H
D. 3D


Answer

Option C is correct answer.

Its a low spin d4 complex.
L = 5
Spectroscopic symbol = H
Spin multiplicity = 2S+ 1 = 3
J = L − S = 4
Therefore, GST = 3H4

× 26.5.2024

Major product formed in the following synthetic sequence on the monoterpene pulegone is-

Major product formed in the following synthetic sequence on the monoterpene pulegone is (CSIR JUNE 2015)


Answer

Option B is correct answer.

Mechanism
The mechanism involves favorskii rearrangement of pulegone followed by ester hydrolysis. The stereochemistry of ester group will be opposite to that of existing methyl group.
Major product formed in the following synthetic sequence on the monoterpene pulegone is

× 27.5.2024

Major product formed in the following sequence is-

Major product formed in the following sequence is (GATE 2020)


Answer

Option C is correct answer.

Mechanism

Major product formed in the following sequence is (GATE 2020)

× 28.5.2024

What is the major product formed in the following reaction

What is the major product formed in the following reaction


Answer

Option D is correct answer.

Mechanism

What is the major product formed in the following reaction

× 29.5.2024

The reaction given below proceeds through-

The reaction given below proceeds through- CSIR Dec 2011


Answer

Option A is correct answer.

Mechanism
This is iodolactonization reaction goes through the formation of positively charged iodonium ion followed by intramolecular ring closer to form lactone.

The reaction given below proceeds through- CSIR Dec 2011

× 30.5.2024

What are the likely product formed in the following reaction-

What are the likely product formed in the following reaction- GATE 1994

Answer

Option C and D both are correct answer.

Mechanism
Allylic oxidation to allylic alcohol or conjugated carbonyl compound.
What are the likely product formed in the following reaction- GATE 1994

× 31.5.2024

Choose the suitable reagent to carry out the following conversion-

Choose the suitable reagent to carry out the following conversion-GATE 1997

Answer

Option C is correct answer.

Mechanism

Choose the suitable reagent to carry out the following conversion-GATE 1997

× 1.6.2024

Most probable product of the given cyclization reaction-

Most probable product of the given cyclization reaction

Answer

Option B is correct answer.

Mechanism

Most probable product of the given cyclization reaction

× 2.6.2024

The following tetraene upon photolysis gives-

The following tetraene upon photolysis gives GATE 2000

Answer

Option B is correct answer.

Mechanism

The following tetraene upon photolysis gives mechanism

× 3.6.2024

Formation of the product in the following reaction involves-

Formation of the product in the following reaction involves GATE 2014

A. di-π Methane Rearrangement
B. Paterno-Buchi Reaction
C. [2,3]-Sigmatropic Rearrangement
D. Norish Type-I Reaction


Answer

Option A is correct answer.

Mechanism

Formation of the product in the following reaction involves mechanism

× 4.6.2024

The major product obtained in the following transformation is-

The major product obtained in the following transformation is UOH M.Sc. 2010

Answer

Option A is correct answer.

Mechanism
It is intramolecular Cannizzaro reaction. Aldehyde group oxidized to acid and keto group reduced to alccohol.

The major product obtained in the following transformation is UOH M.Sc. 2010 Mechanism

× 5.6.2024

The final product of the given series of reaction is-

The final product of the given series of reaction

Answer

Option C is correct answer.

Mechanism

The final product of the given series of reaction Mechanism

× 6.6.2024

The major product of the given reaction is-

The major product of the given reaction is

Answer

Option B is correct answer.

Mechanism
It is a Pinacol-Pinacolone Rearrangement.
The major product of the given reaction is Mechanism

× 7.6.2024

The complex that shows orbital contribution to magnetic moment is

A. [Cu(H2O)6]+2
B. [Ni(H2O)6]+2
C. [Co(H2O)6]+2
D. [Cr(H2O)6]+2


Answer

Option C is correct answer.

Explanation
Electrons present in eg orbitals do not contribute.
Symmetrically filled (t2g3/t2g6) do not contribute.
If electron present in the t2g orbitals are unsymmetrically filled then the orbital contribution to magnetic moment is large.

[Cu(H2O)6]+2: t2g6/eg3:- No Contribution
[Ni(H2O)6]+2: t2g6/eg2:- No Contribution
[Co(H2O)6]+2: t2g5/eg2:- Show orbital Contribution
[Cr(H2O)6]+2: t2g3/eg1:-No Contribution

× 8.6.2024

The major product of the given reaction is-

The major product of the given reaction is

Answer

Option C is correct answer.

Mechanism
Simple addition then elimination followed by aromatization.
The major product of the given reaction Mechanism

× 9.6.2024

The major product of the given reaction is-

The major product of the given reaction CSIR JUNE 2012

Answer

Option B is correct answer.

Mechanism

The major product of the given reaction Mechanism CSIR JUNE 2012

× 10.6.2024

The major product of the given reaction is-

The major product of the given reaction CSIR JUNE 2012

Answer

Option C is correct answer.

Mechanism

The major product of the given reaction Mechanism CSIR JUNE 2012

× 11.6.2024

The major product of the given reaction is-

The major product of the given reaction

Answer

Option D is correct answer.

Mechanism
It is a Baeyer Villiger Oxidation.
The major product of the given reaction Mechanism IISc Ph.D. 2008

× 12.6.2024

The major product formed in the reaction given below-

The major product formed in the reaction given below GATE 2013

Answer

Option D is correct answer.

Mechanism
Its a diazotiation followed by alkyl shift and hydrolysis.
The major product formed in the reaction given below GATE 2013

× 13.6.2024

The major product formed in the reaction given below-

The major product formed in the reaction given below GATE 2000 Organic Chemistry Question

Answer

Option C is correct answer.

Mechanism

The major product formed in the reaction given below GATE 2000 Organic Chemistry Question

× 14.6.2024

The major product formed in the reaction given below-

The major product formed in the reaction given below

Answer

Option C is correct answer.

Mechanism

The major product formed in the reaction given below

× 15.6.2024

Answer

× 16.6.2024

Answer

× 17.6.2024

Answer

× 18.6.2024

Answer

× 19.6.2024

Answer

× 20.6.2024

Answer

× 21.6.2024

In the UV-visible absorption spectrum of an α, β -unsaturated carbonyl compound, with increasing solvent polarity,

A. n→π* transitions undergo hypsochromic shift, π→π* undergo bathochromic shift.
B. n→π* transitions undergo bathochromic shift, π→π* undergo hypsochromic shift.
C. both n→π* and π→π* transitions undergo bathochromic shift.
D. both n→π* and π→π* transition undergo hypsochromic shift.


Answer

Option A is correct answer.

In the UV-visible absorption spectrum of an α,β -unsaturated carbonyl compound with increasing solvent polarity, n→π* transitions undergoes hypsochromic shift and π-π* undergoes bathochromic shift.

× 22.6.2024

Which of the following is correct product of the given reaction-

Which of the following is correct product of the given reaction, NEET, JEE, GATE, CSIR NET JRF
Answer

Option D is correct answer.

Mechanism
Reaction sequence: Dehydration - Ring expansion - Ozonolysis - Aldol condensation - Dehydration

Which of the following is correct product of the given reaction mechanism, dehydration followed by ozonolysis then aldol condensation. NEET, JEE, GATE, CSIR NET JRF

× 23.6.2024

Choose the correct product of the given reaction-

Piancatelli Rearrangement
Answer

Option D is correct answer.

Mechanism
It is a Piancatelli Rearrangement.

Piancatelli Rearrangement Mechanism


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