Daily Chemistry Quiz
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The major product of the given reaction is-
Answer
Option B is correct answer.
Mechanism
The correct product of the given reaction is-
Answer
Option C is correct answer.
Mechanism
The major product of the given reaction is-
Answer
Option B is correct answer.
Mechanism
Which of the following is correct product of the given reaction-
Answer
Option D is correct answer.
Mechanism
Which of the following is correct product of the given reaction-
Answer
Option A is correct answer.
Mechanism
Which of the following is correct product of the given reaction-
Answer
Option B is correct answer.
Mechanism
The major product of the given reaction is-
Answer
Option D is correct answer.
Mechanism
The character table for the D3 point group is provided below:
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.
Which of the following is correct product of the given reaction-
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.
Which of the following is correct product of the given reaction-
Answer
Option B is correct answer.
Mechanism
Which of the following is correct product of the given reaction-
Answer
Option B is correct answer.
Mechanism
Which of the following is correct product of the given reaction-
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Answer
Option C is correct answer.
Mechanism
![[3,3] cope rearrangement Mechanism](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZRyhFYAYE-rP6TTzxHsa4y6Auju844XfjTg2pEm96JlfBpGbzCVd5Q3QY-kCPMMVnc9UOw7xiH4c3Fn26erzjnarQExbSJ9zwg4mEf79DW1hGsvfBIdlmTxbnd0W1sGGkAlZpW_ZQm9e3uZNwQnJR4ik2Mt1ObOoO7swjr2qGDTw-7sfVPNjGs6ci-6F7/s1600/3,3%20cope%20reaction%20Mechanism.gif)
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
Major product formed in the following synthetic sequence on the monoterpene pulegone is-
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 sequence is-
Answer
Option C is correct answer.
Mechanism
What is the major product formed in the following reaction
Answer
Option D is correct answer.
Mechanism
The reaction given below proceeds through-
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.
What are the likely product formed in the following reaction-
Answer
Option C and D both are correct answer.
Mechanism
Allylic oxidation to allylic alcohol or conjugated carbonyl compound.
Choose the suitable reagent to carry out the following conversion-
Answer
Option C is correct answer.
Mechanism
Most probable product of the given cyclization reaction-
Answer
Option B is correct answer.
Mechanism
The following tetraene upon photolysis gives-
Answer
Option B is correct answer.
Mechanism
Formation of the product in the following reaction involves-
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
The major product obtained in the following transformation is-
Answer
Option A is correct answer.
Mechanism
It is intramolecular Cannizzaro reaction. Aldehyde group oxidized to acid and keto group reduced to alccohol.
The final product of the given series of reaction is-
Answer
Option C is correct answer.
Mechanism
The major product of the given reaction is-
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
The major product of the given reaction is-
Answer
Option C is correct answer.
Mechanism
Simple addition then elimination followed by aromatization.
Dehydration of Isoborneol gives the Product-
Answer
Option D is correct answer.
Mechanism
This mechanism go through Wagner-Meerwein Rearrangement.
The major product of the given reaction is-
Answer
Option C is correct answer.
Mechanism
The major product of the given reaction is-
The major product formed in the reaction given below-
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-
Answer
Option C is correct answer.
Mechanism
The major product formed in the reaction given below-
Answer
Option C is correct answer.
Mechanism
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.
Which of the following is correct product of the given reaction-
Answer
Option D is correct answer.
Mechanism
Reaction sequence: Dehydration - Ring expansion - Ozonolysis - Aldol condensation - Dehydration
Choose the correct product of the given reaction-
Answer
Option D is correct answer.
Mechanism
It is a Piancatelli Rearrangement.
Complete the following reaction sequesnce-
Answer
Option D is correct answer.
Mechanism
