Aniline reacts with sodium nitrite and HCl to form benzenediazonium chloride at 273-278 K. The conversion of primary aromatic amines into diazonium salts is known as diazotisation. The amines are basic in nature, hence they form salts with hydrochloric acid. Few amine salts are soluble in excess polar solvents and insoluble in less polar solvents. Tetrahydrofuran (THF), hexane, etc. (Y) on reaction with Br2 and KOH gives (Z). C6H5NH2 Naturally they are found inOptions:(a) proteins (b) vitamins(c) alkaloids (d) All of Question 36. Your email address will not be published. Option A - Gabriel synthesis is used for the preparation of primary amines. 2. Your email address will not be published. MCQ Questions for Class 12 Chemistry with Answers, MCQ Questions for Class 11 Chemistry Chapter 12 Organic Chemistry: Some Basic Principles and Techniques with Answers, MCQ Questions for Class 11 Chemistry Chapter 13 Hydrocarbons with Answers, NCERT Solutions for Class 10 Maths Chapter 11 Constructions Ex 11.2, MCQ Questions for Class 11 Chemistry Chapter 11 The p-Block Elements with Answers, NCERT Solutions for Class 10 Maths Chapter 10 Circles Ex 10.2, MCQ Questions for Class 11 Chemistry Chapter 10 The s-Block Elements with Answers, MCQ Questions for Class 11 Chemistry Chapter 9 Hydrogen with Answers, MCQ Questions for Class 11 Chemistry Chapter 8 Redox Reactions with Answers, MCQ Questions for Class 11 Chemistry Chapter 7 Equilibrium with Answers, MCQ Questions for Class 11 Chemistry Chapter 6 Thermodynamics with Answers, Concise Mathematics Class 10 ICSE Solutions. Option A - The pKb value of aniline is high. (b) Carbylamine reaction (c) More Kfc value of aniline Maths Questions With Answers for Competitive Exams. The nitrogen of amine contains a lone pair of electrons. 10. Reason : Aryl halides undergo nucleophilic substitution with anion formed by phthalimide. (a) (CH3CH2)2NCH3 = N-Ethyl-N-methylethanamine, (c) CH3NHCH (CH3)2 = N-Methylpropan-2-amine, (d) (CH3)2CHNH2 = 2, 2-Dimethyl-N-propanamine, Answer: (a) (CH3CH2)2NCH3 = N-Ethyl-N-methylethanamine, The most convenient method to prepare primary (i Amine) amine containing one carbon atom less is, Identify the correct pathway to convert propanoic acid to ethylamine. (d) 2, 4. Aniline is less basic than ethylamine. NCERT Exemplar Class 12 Chemistry is very important resource for students preparing for XII Board Examination. We have provided Amines Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well. Ethylamine (being an aliphatic primary amine) gives a positive carbylamine test, but dimethylamine does not. Due to its instability, the diazonium salt is generally not stored and is used immediately after its preparation. (d) Iodoform test, 10. Aniline reacts with hydrochloric acid to form anilinium chloride. (b) 1, 2, 4 HCl? The other bases K2CO3, Na2CO3, NaHCO3, are weak bases compared to NaOH. The reactivity of the halides can be explained based on the electronegativity of the halogen atoms. Which one among the following is expected to form a secondary alcohol on treatment with HNO2? Option C - N-Alkylphthalimide, on alkaline hydrolysis gives the primary amine. Students can solve NCERT Class 12 Chemistry Amines MCQs Pdf with Answers to know their preparation level. are organic solvents with different polarities. The other options sodium borohydride is used for reduction reaction. The correct statement is, 'The unshared electron pair on the nitrogen atom is in conjugation with the benzene ring.' Nitro compounds are reduced to amines by passing hydrogen gas in the presence of finely divided palladium. Which of the following compounds is formed on the electrolytic reduction of nitrobenzene in presence of strong acid? Amines, being basic in nature, react with acids to form salts. Option D - The unshared electron pair on the nitrogen atom is less available for protonation. (a) On reaction with nitrous acid alkylamines produce alcohol, (b) On reaction with nitrous acid arylamines produce phenol, (c) Alkylamines are more basic than ammonia, (d) Alkylamines are more basic than arylamines. Nitriles, on reduction with LiAlH4, produce primary amines. (d) Hoffmann mustard oil reaction, 7. They are nitrogen-containing organic compounds. H2SO4 at 455-475 K, it forms. (d) All of these, 8. Among the compounds C3H7NH2, CH3NH2, C2H5NH2, and C6H5NH2. The common name of N, N-Dimethylmethanamine is trimethylamine. In which of the following reactions does amide get converted to amine? The correct decreasing order of boiling points among amines and their corresponding acids and alcohols is शिक्षण प्रक्रिया में शिक्षक को अनेक कार्य एक साथ करने पड़ते हैं जैसे लिखना, प्रश्न पूछना, स्पष्ट करना, प्रदर्शन करना... शिक्षण कौशल ( Teaching Skill) 10. Free primary amine can be obtained from the quaternary ammonium salt, by treatment with a strong base NaOH. A Bronsted–Lowry acid is a proton donor, not an electron-pair acceptor. Option D - Aryl halides do not undergo nucleophilic substitution with potassium phthalimide to form the aromatic primary amine. The major product (X) of the reaction is : 13. ALL RIGHTS RESERVED. The proton is a Lewis acid, as it can accept a pair of electrons. Amines are derivatives of ammonia. Amines MCQ Practice Sheet 1. शिक्षण कौशल (Teaching Skill) Which of the following compounds reacts with NaNO2 and HCl at 0-4°C to give alcohol/phenol? (b) RCH2NH2 > RCH2OH > RCOOH Assertion : Acetanilide is less basic than aniline. 1. Which of the following compounds does not liberate N2 on treatment with HNO2 ? Amines MCQ Practice Sheet 1. The order of reactivity of halides with amines is RI > RBr > RCl. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Reason : Acetylation of aniline results in decrease of electron density on nitrogen. Aromatic Hydrocarbons MCQs. The end product (B) of the reaction sequence : 12. 5. Nitrogen atom of amino group is . Which of the following should be most volatile? (c) 3, 4 (d) Hydrogen bonding, 5. The reagent represented by A, B and C are, When excess of ethyl iodide is treated with ammonia, the product is, Amides may be converted into amines by a reaction named after, Reduction of CH3CH2NC with hydrogen in presence of Ni or Pt as catalvst gives. Question from very important topics are covered by NCERT Exemplar Class 12.You also get idea about the type of questions and method to answer in your class 12th examination. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 13 Amines. 3. Posted on January 13, 2015 February 3, 2015 by Amit Thakur. C2H5NH2 MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. Which of the following can exist as zwitter ion? Which of the following is used as Hinsberg’s reagent? They are nitrogen-containing organic compounds. MCQs on Amines. 1. (c) Ortho and para directing The compound (X) may be. (c) O-and p-products are obtained in good yield 4-Bromobenzenamine is also known as 4-Bromoaniline.The prefix ortho signifies a 1, 2-disubstituted benzene ring, meta signifies 1, 3-disubstitution, and para signifies 1, 4-disubstitution. Any substance that accepts lone pair of electrons is a Lewis acid. Cyclohexyiamine is stronger base than aniline become, (a) in aniline electron pair is involved in conjugation, (b) in cyclohexyiamine electron pair is involve conjugation, (d) in cyclohexyiamine nitrogen has a negative charge, Answer: (a) in aniline electron pair is involved in conjugation, The strongest base among the following is.