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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Resonance forms are in equilibrium with each other.
(2)
Identify the false statement regarding resonance.
[A]
As the number of charges increases, the resonance forms gets more significant
[B]
Zero charge of resonance is the most significant one
[C]
Atoms with full octet resonance form are more stable when compared with the one with unfilled octet
[D]
Resonance is unstable in case of unfilled octet of nitrogen atom
Answer: As the number of charges increases, the resonance forms gets more significant
(3)
Identify the correct sequence according to electronegativity.
[A]
F > NH2 > CH3 >OH`
[B]
NH2 `> F` >CH3` > OH`
[C]
NH2 `> OH` > CH3` > F`
[D]
F` > OH` > NH2` > CH3`
Answer: F` > OH` > NH2` > CH3`
(4)
Identify the correct sequence with respect to Inductive effects.
[A]
CF3`> CH2F`> CHF2`> CF3`
[B]
CF3`> CHF2`> CH2F`> CH3`
[C]
CH3`> CH2F`> CHF2`> CF3`
[D]
CH3`> CHF2`> CH2F`v CF3`
Answer: CF3`> CHF2`> CH2F`> CH3`
(5)
Stability sequence: primary carbocation > secondary carbocation > tertiary carbocation. Is this sequence correct?
(6)
Identify the incorrect statement regarding aromaticity.
[A]
It is the extra stability possessed by a molecule
[B]
p-orbitals must be planar and overlap
[C]
Cyclic delocalization takes place
[D]
It does not follow Huckel’s rule
Answer: It does not follow Huckel’s rule
(7)
Aromatic rings do not have resonance structures.
(8)
Select the correct statement regarding the aromatic nitrogen molecule.
[A]
It is not hybridized
[B]
It is sp hybridized
[C]
It is sp2 hybridized
[D]
It is sp3 hybridized
Answer: It is sp2 hybridized
(9)
Can a linear molecule have aromaticity.
(10)
Select the incorrect statement.
[A]
A resonance may sometimes cause sp3 atoms to become sp2 hybridized
[B]
Delocalizing one lone pair causes aromaticity
[C]
One lone pair will be counted as two pi electrons according to Huckel’s equation
[D]
Two sigma bonds make up a double bond
Answer: Two sigma bonds make up a double bond
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