321 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26OR0450 · On heating with dilute sulfuric acid, napththalene-1 sulfonic acid gives predominantly · Heterocyclic Compounds – General
ABC26OR0451 · Identify the major P in the following two-step reaction: · Heterocyclic Compounds – General
ABC26OR0452 · Match the structure in List - I with their correct names in List - II. List - I (P) (i) 3-methyl furan (Q) (ii) Imidazole (R) (iii)… · Heterocyclic Compounds – General
ABC26OR0453 · The decreasing order of the reactivity of the following compounds towards electrophiles is I II III · Heterocyclic Compounds – General
ABC26OR0454 · The major product formed in the reaction of quinoline with potassium amide (KNH2 ) in liquid ammonia is: · Heterocyclic Compounds – General
ABC26OR0455 · The major products X and y formed in the following reactions are · Heterocyclic Compounds – General
ABC26OR0456 · The major product of the following reaction is, · Heterocyclic Compounds – General
ABC26OR0457 · (being typed) · Heterocyclic Compounds – General
ABC26OR0458 · The major product P of the following reaction is: · Intermediate – General
ABC26OR0459 · 2(b) The major product on sulphonation of Q with H2 SO4 at 160 C is: · Intermediate – General
ABC26OR0460 · Predict the major product P in the following reaction · Intermediate – General
ABC26OR0461 · The major product (X) of the monobromination reaction is · Intermediate – General
ABC26OR0462 · The major product obtained upon treatment of compound X with H2SO4 at 80 is: · Intermediate – General
ABC26OR0463 · In the following reaction, (X) and (Y) respectively are · Intermediate – General
ABC26OR0464 · In the carbylamine reaction, R-X is converted to R-Y via the intermediate Z. R-X, R-Y and Z, respectively, are · Intermediate – General
ABC26OR0465 · The photochemical reaction of 2 - methylpropane with F2 gives 2-fluoro-2 - methylpropane and 1-fluoro 2 - methylpropane in 14:86 ratio. The… · Intermediate – General
ABC26OR0466 · The major product of the following reaction is · Intermediate – General
ABC26OR0467 · In the following compound, the hydroxy group that is most readily methylated with CH2 N2 is: · Intermediate – General
ABC26OR0468 · The most appropriate sequence of reactions for carrying out the following transformation. · Intermediate – General
ABC26OR0469 · The major product X (based on the preferred conformation) in the reaction · Intermediate – General
ABC26OR0470 · The reactive intermediate I and the product P are · Intermediate – General
ABC26OR0471 · The major product X (based on the preferred conformation) in the reaction · Intermediate – General
ABC26OR0472 · In the reaction sequence, the structure of the major product Z and the overall yield for its formation from the ketone X , are · Intermediate – General
ABC26OR0473 · In the reaction, the major product [X] is: · Intermediate – General
ABC26OR0474 · In the reaction the major product [X] is: · Intermediate – General
ABC26OR0475 · In the reaction, the major product [X] is · Intermediate – General
ABC26OR0476 · In the following reaction, · Intermediate – General
ABC26OR0477 · In the following reaction, the major product [X] is: · Intermediate – General
ABC26OR0478 · Identify the most probable product in the given reaction · Intermediate – General
ABC26OR0479 · The major product formed in the reaction given below is: · Intermediate – General
ABC26OR0480 · The major product formed in the Beckmann rearrangement of the compound given below is: · Intermediate – General
ABC26OR0481 · The major product formed in the reaction given below is · Intermediate – General
ABC26OR0482 · The major product formed in the following reaction is · Intermediate – General
ABC26OR0483 · The following synthetic transformation can be achieved using Reagents: (p) (i) NH2 OH / H+, (ii) H2 SO4 (q) NH3 / H+ (r) (i) NH2 OH / H+… · Intermediate – General
ABC26OR0484 · Major product formed in the following transformation is · Intermediate – General
ABC26OR0485 · beta -D-Glucose is represented as · Natural Products & – General
ABC26OR0486 · (being typed) · Natural Products & – General
ABC26OR0487 · Which one of the following compunds will form as osazone derivative? · Natural Products & – General
ABC26OR0488 · D-Glucose and D-fructose interconvert into each other in aqueous alkaline solution. Suggest a mechanism for the interconversion. · Natural Products & – General
ABC26OR0489 · Proteins are biopolymers. The monomer units present in them are · Natural Products & – General
ABC26OR0490 · Identify the structure of the major product formed in the following reaction, and give a mechanism of its formation. · Natural Products & – General
ABC26OR0491 · For the aldotetroses I-IV, the combination of TRUE statements, among P - T, is: I II III IV P = I and II are diastereomers and II and III… · Natural Products & – General
ABC26OR0492 · Three molecular ionic states, P-R, are possible for the amino acid histidine. Identify the correct choice of pH values, respectively, for… · Natural Products & – General
ABC26OR0493 · The pKa values for the three ionizable groups X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively. The isoelectric point for the… · Natural Products & – General
ABC26OR0494 · contain a Statement with a Reason and an Assertion. For each question, choose the correct answer from the following four choices… · Natural Products & – General
ABC26OR0495 · contain a Statement with a Reason and an Assertion. For each question, choose the correct answer from the following four choices… · Natural Products & – General
ABC26OR0496 · Match the following compounds with their respective classes. I. II. III. IV. · Natural Products & – General
ABC26OR0497 · Identify the Correct set of stereochemical relationships amongst the following monosaccharides I-IV I II III IV · Natural Products & – General
ABC26OR0498 · Select the correct pair of statements: (I) Complementary strands run antiparallel in a double stranded DNA. (II) The triplet codons… · Natural Products & – General
ABC26OR0499 · Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline condi tions. The reaction has a… · Natural Products & – General