JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumDiagram reading
JEE Main 27 August 2021, Shift 2, Chemistry Q41
Question 41 of 90 in this shift, Chemistry question 11 of 30, Section A.
The major product of the following reaction, if it occurs by mechanism is :
[reaction drawn: a benzene ring bearing OH, plus a skeletal bromo-substituted chain drawn with a C=C double bond, with / acetone over the arrow]
The figure, in words
Stem drawing: benzene ring with OH at top, + a skeletal chain: a carbon bearing two plain lines (left), C=C double bond, then single bonds ending in Br; arrow labelled K2CO3 over acetone. Options are four line structures containing a benzene ring and an ether O.- (1)[structure: a carbon bearing two plain line substituents is bonded both to an O-attached benzene ring (hanging below it) and to a two-bond chain that leads to an O attached to a second benzene ring (at right)]
- (2)[structure: benzene ring - O - line - line, then a C=C double bond whose end carbon forks into two plain line substituents]Official answer
- (3)[structure: benzene ring - O - a carbon bearing two plain line substituents (one up, one down) and a line leading to a C=C double bond at right]
- (4)[structure: a carbon bearing a double-bond line (upper left) and a plain line (lower left), then a two-bond chain leading to O attached to a benzene ring (at right)]
Official answer
Option 2
NTA final key.
- Chapter
- Alcohols, Phenols and Ethers
- Topic
- Ethers
- Idea tested
- Williamson Synthesis Limits