Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is
A
B
C
D
Explanation
IUPAC name of the structure is
3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid
2
NEET 2013
MCQ (Single Correct Answer)
The radical,
is aromatic because it has
A
7 p-orbitals and 7 unpaired electrons
B
6 p-orbitals and 7 unpaired electrons
C
6 p-orbitals and 6 unpaired electrons
D
7 p-orbitals and 6 unpaired electrons.
Explanation
In benzyl free radical it has 6 p orbitals, each containing one
unpaired electron, in a six membered cyclic
structure is in accordance with Huckel rule of
aromaticity.
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
Which nomenclature is not according to IUPAC system?
A
B
C
D
Explanation
In IUPAC nomenclature, preference is given
to multiple bond than halogen substituent.
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
The IUPAC name of the following compound is
A
trans-2-chloro-3-iodo-2-pentene
B
cis-3-iodo-4-chloro-3-pentane
C
trans-3-iodo-4-chloro-3-pentene
D
cis-2-chloro -3-iodo-2-pentene.
Explanation
$$ \therefore $$ IUPAC name is trans-2-chloro-3-iodo-2-pentene.
Questions Asked from Some Basic Concepts of Organic Chemistry
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
