GATE Collected papers 2000–2022 · chemistry questions

167 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.

ABC26OR0536 · The major proeduct of the following reaction is · Organic Synthesis – General
ABC26OR0537 · The compound that is NOT oxidized by KMnO4 is: · Organic Synthesis – General
ABC26OR0538 · The major product P of the following reactions is (P) · Organic Synthesis – General
ABC26OR0541 · In the reaction the major product X is · Organic Synthesis – General
ABC26OR0542 · Reaction of m-menthylanisole with lithium in liquid ammonia and t-butyl alcohol at –33°C generates compound X as the major product… · Organic Synthesis – General
ABC26OR0543 · In the reaction sequence the major products X and Y, respectively are · Organic Synthesis – General
ABC26OR0545 · In the reaction, the major products, [X] and [Y], respectively, are · Organic Synthesis – General
ABC26OR0548 · In the following reaction, (iii) H3O^+ the major product [X] is: · Organic Synthesis – General
ABC26OR0549 · The mosjt appropriate sequence of reactions for carrying out the following conversion is · Organic Synthesis – General
ABC26OR0553 · Order of reactivity of the following dienes X, Y and Z in Diels–Alder reaction is (X) (Y) (Z) · Cycloaddition Diels Alder
ABC26OR0554 · The major product P of the given reaction is · Pericyclic Reactions – General
ABC26OR0555 · The major product P formed in the following photochemical reaction is · Pericyclic Reactions – General
ABC26OR0559 · Identify the major product P and Q in the following reactions from the list of compounds I to IV. I II III IV · Pericyclic Reactions – General
ABC26OR0561 · The reaction between X and Y to give Z proceeds via X + Y Z · Cycloaddition Diels Alder
ABC26OR0568 · In the reaction, [X] the major product [X] is: · Pericyclic Reactions – General
ABC26OR0571 · The diene which undergoes Diels-Alder reaction with maleic anhydride is: · Cycloaddition Diels Alder
ABC26OR0572 · In the following reaction, [X] the major product [X] is: · Pericyclic Reactions – General
ABC26OR0574 · The pericyclic reaction given below is an example of · Sigmatropic Shifts
ABC26OR0579 · The major product X and Y formed in the following reaction sequence are cis - stilbene [C6H12]h nu [air]I2 Y · Pericyclic Reactions – General
ABC26OR0582 · In the two setp reaction sequence given below, the starting bis - sulfone acts as + heat · Cycloaddition Diels Alder
ABC26OR0586 · The major product formed in the following reaction is · Pericyclic Reactions – General
ABC26OR0587 · In a 400 MHz 1H NMR spectrometer, a proton resonates at 1560 Hz higher than that of tetramethylsilane. The chemical shift value of this… · Pericyclic Reactions – General
ABC26OR0592 · The major product X formed in the reaction given below is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0595 · The most suitable reagent (s) to effect the following transformed is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0596 · The most suitable reagent for performing the following transformation, is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0599 · The most suitable reagent for the following transformation is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0600 · The major product obtained in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0601 · The major product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0605 · The major product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0610 · The major product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0611 · Major product formed in the following transformation is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0614 · In the following reaction sequence, the major products Q and R are: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0615 · Major products P and Q, in the given reaction sequence, are: P Q · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0617 · The major product P and Q formed in the following reactions P Q respectively, are: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0619 · In the following reaction X the major products X and Y, respectively, are: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0620 · The major product M formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0624 · The major products M and N in the given reaction sequence are N · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0627 · (E)-3-bromo-3-hexene when treated with CH3O- in CH3OH gives · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0631 · Arrange the following halides in the decreasing order of SN1 reactivity CH3CH2CH2Cl, CH2=CHCH(Cl)CH3, CH3CH2CH(Cl)CH3 · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0638 · The major product P formed in the given reaction is: P · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0641 · Identify the major product P in the following reaction: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0642 · Classify the following species as electrophiles (E) and nucleophiles (N) in routine organic synthesis SO3 Cl^+ CH3NH2 H3O^+ BH3 CN^- · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0643 · In the reaction, if the concentration of both the reactants is doubled, then the rate of the reaction will · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0644 · The most suitable reagent combination to bring out the following transformation is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0645 · In the reaction, Ph3P MeI [X] n-BuLi [Y], the compounds X and Y, respectively are · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0646 · The decreasing order of nucleophilicity for the following anions is CH3 CO2-, CH3 O-, C6 H4 O-, NO3- · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0653 · The major product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0654 · The major product obtained in the following reaction, is H-C≡ C-CH2OH (i) LiNH2 (2 equiv.)/liq. NH3 (ii) C2H5Br (1 equiv.) (iii) H3O+ · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0656 · The major products M and N in the following reaction sequence are (M) (N) + + LiI · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0657 · The product obtained in the following solvolysis reaction is Enantiomerically pure compound · Reagents, Reaction Mechanisms & Named Reactions – General