61. Buta-1, 3-diene on heating with maleic anhydride would give
62. In the following reaction sequence,
the major product [X] is
the major product [X] is
63. The diene which undergoes Diels-Alder reaction with maleic anhydride is
64. Which of the statements is correct about the mechanism of the following reaction?
65. The major product formed in the thermal reaction given below, is
66. The major product formed on nitration of N, N-dimethylaniline with conc. H2SO4, HNO3 mixture is
67. In the reaction sequence,
X and Y respectively are
X and Y respectively are
68. The major product formed in the reaction of benzoic acid with isobutylene in the presence of catalytic amount of sulphuric acid is
69. Among the following, the optically inactive compound is
70. In the following reaction,
the major product [X] is
the major product [X] is
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