12th Chemistry 1 Marks Organic nitrogen compounds

One Mark Study Material Unit wise as per reduced syllabus (2021-22)

TN 12th Chemistry 1 Marks Organic nitrogen compounds: 12th Chemistry Important Questions Chapter 13. +2 Chemistry Important 2 Marks,  3 Marks, 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). HSC 12th Chemistry Revision Test Important Questions. 12th Tamil Full Guide.

Organic nitrogen compounds: 

• 1. The aqueous solution sodium acetate, ammonium chloride, sodium nitrate are respectively basic, acidic, basic
• 2. Two molecules of propane nitrile in the presence of Na/ether to form 3-imino2- methypentanenitrile. The reaction is known as Thorpe nitrile condensation
• 3. Nef Carbonyl synthesis given by C₆H₅CHO (Benz aldehyde)
• 4. H₂SO₅ is Caro’s acid.
• 5. The major product of the reaction between m-dinitrobenzene with (NH4)S8 is
  C₆H₃(NH₂)₂SH
• 6. CH₃Cl + KCN → A + H+/H₂O → B + NH3 → C + Heating → D . The product “D” of the reaction is ? CH₃CONH₂(Acetamide)
• 7. CH₃COCl (X) + NH₃ → C₄H₉ON + Br₂/KOH →CH₃-CH₂-CH₂-NH₂ identify X in the sequence of reaction. CH₃-CH₂-CH₂-COCl
• 8. Ammonium salt of benzoic acid is heated strongly with P2O5 and the product so formed is reduced and then treated with NaNO2/ Hcl at low temperature. The final compound formed is Benzyl alcohol
• 9. Identify X in the sequence given below C6H4(NH2)(Cl) + CHCl3 + KOH →Y + HCl / 300K → X + methanoic acid. What is X? C₆H₄NH₂Cl
• 10. The major product of the following reaction. C6H4 (COOH)2 + NH3 + strong heating →
  C₆H₄(CO)₂NH
• 11. Nitrobenzene on reaction with fuming nitric acid at 80-100oc forms 1,3, – dinitrobenzene products is formed.
• 12. Secondary nitro alkanes react with nitrous acid to form blue solution
• 13. C₅H₁₃N reacts with HNO2 to give optically active compound. The compound is
  pentane – 2-amine
• 14. Triethylamine does not undergo acetylation.
• 15 When aniline reacts with acetic anhydride the product formed is acetanilide
• 16. The order of basic strength for methyl substituted amines in aqueous solution is
  N(CH₃)₂H > N(CH₃)H₂ > N(CH₃)₃ . NH₃
• 17. Hoffmann hypobromamide reaction is appropriate for converting acetamide to methanamine.
• 18. Consider the nitration of benzene using mixed with Con.H2SO4 & HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be Slower
• 19.CH₃-CH₂-CH₂-Br + NaCN → CH₃-CH₂-CH₂-CN + NaBr this reaction will be fastest in this reagent is N, N’ – dimethylformamide (DME)
• 20. The no. of. Structural isomers possible from the molecular formula C3H9N is 3
• 21. The electrolytic reduction of nitrobenzene in strongly acidic medium produces p- aminophenol
• 22. C₆H₅N₂+X– is the most stable diazonium salt.
• 23. Acetamide is treated with NaOH / Br₂ reagents separately these would yield methylamine.
• 24. Aryl amines react with nitrous acid to produce phenols these statements about primary amine is false.
• 25. Methyl isocyanides on reduction with LiALH4 yields a secondary amine.
• 26. Electrolytic reduction of nitrobenzene in weakly acidic medium gives aniline
• 27. Amides can be converted into amines by a reaction named after Hofmann
• 28. Write the IUPAC name of (CH₃)₃-C-CH₂-NO₂ is 1,2 – dimethyl – 1 – nitro propane
• 29. Write the IUPAC name of C₆H₅-CH₂-CH₂-NO₂ is 2 – phenyl-1-nitroethane
• 30. Acidic nature of nitro alkanes correct order is CH₃-NO₂ > CH₃-CH₂-NO₂ > (CH₃)₂CH- NO₂
• 31. When benzene is heated at 330K with a nitrating mixture electrophilic substitution takes place to form nitrobenzene (oil of mirbane)
• 32.CH₃-NO₂ + 3Cl₂ + NaOH→ CCl₃NO₂ (Chloropicrin) + 3HCl
• 33. Nitrobenzene does not undergo Friedel – craft’s reaction due to the strong deactivating nature of –NO2 group.
• 34. Write the IUPAC name of CH3-N-C2H5-CH(CH3)2 is N-ethyl – N – methyl propan- 2 – amine
• 35. Aryl halides do not undergo nucleophile substitution with anion is formed by phthalimide.
• 36. The reduction reaction in which Na / C2H5OH with aryl cyanides gives primary amines such reaction is called as “Mendius Reaction”
• 37. The order of the reactivity of alkyl halides with amines is RI . RBr > RCl.
• 38. The basicity of order of aliphatic amines is R₃N > R₂NH > R-NH₂
• 39. Alkyl & Aryl secondary amines react with nitrous acid to give N – nitro so amine as yellow oily liquid which is insoluble in water. This reaction is known as Liebermann’s nitoso compound
• 40. When aniline is treated with CS2 S-biphenyl urea is formed which on boiling with strong Hcl, phenylisocyanate (phenyl mustard oil) is formed. Such reaction is called as Mustard oil- reaction
• 41. In case of substituted aniline, electron releasing group like –CH₃, -OCH₃, -NH₂
  increase the basic strength.
• 42. In case of substituted aniline electron withdrawing group like –No₂, – X , -COOH
  decrease the basic strength.
• 43. The relative basicity of amines follows in this order Alkyl amines > Aralkyl amines > Ammonia > N – aralkyl amines > aryl amines.
• 44. Aniline reacts with Br₂/ H₂O (or) Br₂/CH₃COOH gives 2,4,6, tribromo aniline(White precipitate)
• 45. In the aqueous solution the substituted ammonium cations get stabilized not only by electron releasing (+I) effect of the alkyl group but also by solvation with water molecules
• 46. When vapor of an alcohol and ammonia are passed, over Al₂O₃.W₂O₃ (or) SiO₂ at 400⁰c, all types of amines are formed this method is called Sabatier – Mailhe method.
• 47.  Aniline and other aryl amines are usually colorless but when exposed to air they
  become coloured due to oxidation
• 48. Aniline cannot be prepared by this Gabriel phthalimide method because the aryl halides do not undergo nucleophile substitution with anion formed by phthalimide.
• 49. Amino groups can be directly converted into nitro group by using Caro’s acid, (or)
  persulphuric acid(or) peroxytrifluro acetic acid as an oxidizing agent..
• 50. Aromatic tertiary amines reacts with nitrous acid at 273k to give p-nitroso N,N- dimethyl aniline.