Basics of organic reaction mechanism
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Basics of organic reaction mechanism questions with answers

86 multiple-choice questions. Open any question for its answer and explanation.

  1. Among the carboxylic acid shown below, the ones that exhibit stereoisomerism and also form, cyclic anhydrides on heating are I. HOOCCH(CH3)CH2CH2COOH II. HOOCCH(C3H7)COOH III. HOOCCH(C2H5)CH2COOH IV. HOOCC(CH3)(C2H5)COOH
  2. Match the following compounds with their respective classes
  3. The sequence of an mRNA molecule produced from a DNA template strand with the composition 5'-AGCTACACT-3' is
  4. The mono protonation of adenine (X) in acidic solution mainly occurs at
  5. The molecules(s) that exist as meso structure (s) is/are
  6. Three molecular ionic states, P-R are possible for the amino acid histidine. Identify the correct choice of pH values, respectively for the observation of the ionic states P-R.
  7. In allene, hybridization of the central and terminal carbons respectively, are
  8. In electrophilic aromatic substitution reactions, nitro group is meta-directing because the nitro group
  9. The major product formed in the reaction of anisole with lithium, liquid ammonia and t-butanol is
  10. The number of signals that appear in the broad-band decoupled 13C NMR spectrum of ortho, meta and para-dichlorobenzene, respectively are
  11. The configurations at the two asymmetric centres (C-1 and C-6) in the bicyclo [4.4.0] decane, given below are
  12. In the reaction, if the concentration of both the reagents is doubled then the rate of the reaction will
  13. Cyclohexyl benzyl ether when reacted with hydrogen in the presence of 10% palladium on charcoal generates a mixture of
  14. Optically active 2-octanol rapidly loses its optical activity when exposed to
  15. Benzaldehyde can be prepared by reacting phenyl magnesium bromide with
  16. The increasing order of basicity among the following is
  17. The major product (X) of the monobromination reaction is A. B. C. D.
  18. Proton decoupled 13C NMR spectrum of a bicyclooctane (C8H14), exhibits only two signals. The structure of the compound is A. B. C. D.
  19. Buta-1, 3-diene on heating with maleic anhydride would give A. B. C. D.
  20. In the following reaction sequence, the major product [X] is A. B. C. D.
  21. The diene which undergoes Diels-Alder reaction with maleic anhydride is A. B. C. D.
  22. Which of the statements is correct about the mechanism of the following reaction?
  23. The major product formed in the thermal reaction given below, is
  24. The major product formed on nitration of N, N-dimethylaniline with conc. H2SO4, HNO3 mixture is A. B. C. D.
  25. In the reaction sequence, X and Y respectively are A. B. C. D.