Nucleophilic Substitution in Pyridine MCQ

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• Electron-withdrawing groups inhibit the Chichibabin reaction. Which of the following statement is not true about this fact?
  ক

  they increase the basicity of the ring nitrogen

  খ

  these electron-withdrawing groups can also form complexes with sodium amide

  গ

  for single electron transfer pathway, altering the distribution of spin density of the intermediate radical anion

  ঘ

  they slow down the sorption on sodium amide
• Nucleophilic substitution reaction of pyridine is most effective in which of the conditions?
  ক

  In slightly acidic conditions

  খ

  In slightly basic conditions

  গ

  In neutral medium

  ঘ

  No specific condition requirements
• Pyridine undergoes nucleophilic substitution with excess of NaNH2 at 100℃ to give which of the following?
  ক

  3-aminopyridine

  খ

  2,6-diaminopyridine

  গ

  3,5-diaminopyridine

  ঘ

  2,5-diaminopyridine
• Pyridine undergoes nucleophilic substitution with NaNH2 at 100℃ to give which of the following?
  ক

  3-aminopyridine

  খ

  2-aminopyridine

  গ

  3,5-diaminopyridine

  ঘ

  2,5-diaminopyridine
• At which position of pyridine nucleophilic substitution reaction is most preferred?
  ক

  First and third

  খ

  Second

  গ

  Third

  ঘ

  Second and Forth