JEE Main 2020 (5 Sep, Shift 1) Chemistry Q28: Hydrocarbons

Question

In the following reaction sequence the major products A and B are :

Accepted Answer

Option 4: [structure] A = a six-membered ring with alternating double bonds and two unlabelled line stubs on adjacent ring positions away from the ring carbon bearing the side chain, bonded to C(=O), then a zig-zag of two more vertices ending in CO$_2$H; B = a fused two-ring structure (the same six-membered ring with two unlabelled line stubs, fused to a second six-membered ring with only single bonds drawn and a C=O)

Answer

[structure] A = a six-membered ring with alternating double bonds and two unlabelled line stubs on adjacent ring positions next to the ring carbon bearing the side chain, bonded to C(=O), then a zig-zag of two more vertices ending in CO$_2$H; B = a fused two-ring structure (the same six-membered ring with two unlabelled line stubs, fused to a second six-membered ring that has one C=C double bond drawn and a C=O)

Answer

[structure] A = a six-membered ring with alternating double bonds and two unlabelled line stubs on adjacent ring positions away from the ring carbon bearing the side chain, bonded to C(=O), then a zig-zag of two more vertices ending in CO$_2$H; B = a fused two-ring structure (the same six-membered ring with two unlabelled line stubs, fused to a second six-membered ring with only single bonds drawn and no C=O)

Answer

[structure] A = a six-membered ring with alternating double bonds and two unlabelled line stubs on adjacent ring positions next to the ring carbon bearing the side chain, bonded to C(=O), then a zig-zag of two more vertices ending in CO$_2$H; B = a fused two-ring structure (the same six-membered ring with two unlabelled line stubs, fused to a second six-membered ring with only single bonds drawn and a C=O)

Answer

[structure] A = a six-membered ring with alternating double bonds and two unlabelled line stubs on adjacent ring positions away from the ring carbon bearing the side chain, bonded to C(=O), then a zig-zag of two more vertices ending in CO$_2$H; B = a fused two-ring structure (the same six-membered ring with two unlabelled line stubs, fused to a second six-membered ring with only single bonds drawn and a C=O)

JEE Main 5 September 2020, Shift 1, Chemistry Q28

Same idea in other shifts