Related InterviewSolutions

• Give the order of `(a)` nucleophilicity `(b)` basic character, and `(c)` fugacity of the following : (i) `F^(Ө)` (ii) `Cl^(Ө)` (iii) `Br^(Ө)` (iv) `I^(Ө)`.
• The decreasing order of the basic character of the following is : (I) `F^(Ө)` (II) `NO_3^(Ө)` (III) `H_2 O` (IV) `CH_3 OH`.A. `(II) gt (I) gt (IV) gt (III)`B. `(III) gt (IV) gt (I) gt (II)`C. `(I) gt (II) gt (III) gt (IV)`D. `(IV) gt (III) gt (II) gt (I)`
• Which of the following statements are correct ?A. `EtO^(Ө)` is a stronger nucleophile than `overset (Ө) O H`.B. `MeO^(Ө)` is a stronger nucleophile than `overset (Ө) O H`C. `RCOO^(Ө)` is a stronger nucleophile than `ROH`.D. `MeO^(Ө)` is a weaker nucleophile than `overset (Ө) O H`.
• Consider the following reactions : Anti-addition takes place in :A. `(I),(II),(V)`B. `(III),(IV),(VI)`C. `(I),(II),(IV)`D. `(III),(IV),(V)`
• From the following elimination reactions, predict which one is Hofmann or Saytzeff (Zaitev) type.
• In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base. Which statement is correct about the following reactions ? A. The major product is `(I)` by `E1` machanism.B. The major product is `(I)` by `E2` machanism.C. The major product is `(II)` by `E1` machanism.D. The major product is `(II)` by `E2` mechanism.
• In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base. Refer to Q.No.14 and find out which statement is correct ?A. Both reactions proceeds by `E2` mechanism.B. Both reactions proceed by `E1` mechanism.C. Formations of (B) and (c) proceed by `E1` and `E2` mechanisms, respectively.D. Formations of (B) and (c) proceeds by `E2` and `E1` mechanism, respectively.
• In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base. Which statement is wrong about the given reaction. .A. The reaction proceeds by `E1cB` mechanism.B. `EWG(-SO_3H)` stabilities the carbanion formed in the first step.C. The reaction in stereospecific but non-regioselectiveD. `PhO^(Ө)` is a stronger base than `overset (Ө) O H` ion.
• Consider the following reactions : Syn-addition takes place in :A. `(I),(II),(V)`B. `(III),(IV),(VI)`C. `(I),(II),(IV)`D. `(III),(IV),(V)`
• In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base. Which statement is wrong about the given reaction ? .A. The reaction is called Cope reaction and proceeds by `E1` mechanism.B. The reaction proceedsby syn-elimination.C. The reaction is stereospecific and stereselective.D. The reaction is non-stereospecific and regioselective.