Elimination Reaction MCQ

Test your knowledge with important Elimination Reaction MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Elimination Reaction MCQs at Bissoy

• Which of the following are incorrect statement?
  ক

  X being electronegative, makes the H (on C-2) more acidic

  খ

  Due to electron withdrawal nature of X, it stabilises the carbanion

  গ

  (X) destabilises the carbanion due to the presence of lone pairs

  ঘ

  The reaction proceeds by an E1CB pathway
• Which of the following compounds cannot give E1CB reaction?
  ক

  CF3 – CHCl2

  খ

  C6h5 – CH2 – CH2F

  গ

  CH3 – CH2 – CH2Br
• In which reaction product formation takes place by hoffmann rule?
  ক

  I and II

  খ

  II and III

  গ

  I, II and III

  ঘ

  I, II, III and IV
• Which incorrect about alkyl bromide having molecular formula C5H11Br?
  ক

  One isomeric alkyl bromide undergoes E1 elimination at the fastest rate

  খ

  Only one is incapable of reacting by the E2 mechanism

  গ

  Only one isomer gives a single alkene on E2 elimination

  ঘ

  2-Bromopentane gives the most complex mixture of alkenes on E2 elimination
• Which of the following statement (s) is/are true about the following eliminations? (1) Hoffmann product is major product in I (2) Saytzeff product is major product in I (3) Hoffmann product is major product in II (4) Saytzeffproduct is major product in II
  ক

  1 and 2

  খ

  1 and 4

  গ

  2 and 3

  ঘ

  3 and 4
• Which of the following statement is correct regarding the following reaction?
  ক

  Major product is endocyclic alkene formed according to Saytzeff

  খ

  Major product is exocyclic alkene formed according to Saytzeff

  গ

  Major product is exocyclic alkene formed according to Hoffmann

  ঘ

  Major product is endocyclic alkene formed according to Hoffmann
• Which of the following order is incorrect for the rate of E2 reaction?
  ক

  5-Bromocycloheptene > 4-Bromocycloheptene

  খ

  2-Bromo- I -phenylbutane > 3-Bromo- I-phenylbutane

  গ

  3-Bromocyclohexene > Bromocyclohexane

  ঘ

  3-Bromo-2-methylpentane > 2-Bromo-4-methylpentane
• Which of the following statements is correct for alkyl halide?
  ক

  Alkyl halide will always show SN1 mechanism

  খ

  As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanism

  গ

  In unimolecular reaction, increasing the temperature donot favours E1 mechanism

  ঘ

  In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reaction
• Which of the following is incorrect statement for the giver reaction?
  ক

  Rate of formation of II and IV would be identical

  খ

  Rate of formation of I would be slower than that of III

  গ

  Formation of I would show primary isotope effect

  ঘ

  Formation of III involves E1 reaction
• Assuming both the reactions as E1, where will the expected ratio between KH/KD lies between?
  ক

  nearly I

  খ

  nearly 3

  গ

  nearly 5

  ঘ

  anything in between 2 and 8