Amines MCQ Class 12 Chemistry
Please refer to Chapter 13 Amines MCQ Class 12 Chemistry with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 12 Chemistry. Students should refer to MCQ Questions for Class 12 Chemistry with Answers to score more marks in Grade 12 Chemistry exams. Students should read the chapter Amines and then attempt the following objective questions.
MCQ Questions Class 12 Chemistry Chapter 13 Amines
Amines MCQ Class 12 Chemistry provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.
Question. Intermediates formed during reaction of RCONH2 with Br2 and KOH are
(a) RCONHBr and RNCO
(b) RNHCOBr and RNCO
(c) RNHBr and RCONHBr
Question. Propionamide on Hofmann degradation gives –
(a) methyl amine
(b) ethyl amine
(c) propyl amine
(d) ethyl cyanide
Question. Ethyl amine can be obtained by the
(a) Action of NH3 on ethyl iodide.
(b) Action of NH3 on ethyl alcohol.
(c) Both (a) and (b)
(d) Neither (a) nor (b)
Question. The best reagent for converting 2 – phenylpropanamide into 2-phenylpropanamine is ___________.
(a) excess H2
(b) Br2in aqueous NaOH
(c) iodine in the presence of red phosphorus
(d) LiAlH4in ether
Question. A secondary amine is
(a) a compound with two carbon atoms and an –NH2 group.
(b) a compound containing two –NH2 groups.
(c) a compound in which hydrogens of NH3 have been replaced by two alkyl groups.
(d) a compound with an –NH2 group on carbon atom in number two position.
Question. The total number of electrons around the nitrogen atom in amines are
Question. Secondary amines could be prepared by
(a) reduction of nitriles
(b) Hofmann bromamide reaction
(c) reduction of amides
(d) reduction of isonitriles
Question. Gabriel’s phthalimide synthesis is used for the preparation of
(a) Primary aromatic amines
(b) Secondary amines
(c) Primary aliphatic amines
(d) Tertiary amines
Question. The number of primary amines of formula C4H11N is :
Question. The correct IUPAC name for CH2 = CHCH2NHCH3 is
Question. Amines play an important role in the survival of life. Naturally they are found in
(d) All of these
Question. An alkyl or benzyl halide on reaction with an ethanolic solution of ammonia undergoes
(a) electrophilic substitution reaction
(b) nucleophilic substitution reaction.
(c) free radical mechanism.
(d) nucleophilic addition reaction.
Question. Amines have
(a) Garlic odour
(b) Fishy odour
(c) Jasmine odour
(d) Bitter almonds odour
Question. The basic character of amines is due to
(a) presence of nitrogen atom
(b) lone pair of electrons on nitrogen atom
(c) tetrahedral structure
(d) high electronegativity of nitrogen
Question. Aliphatic amines are…..basic than NH3 but aromatic amines are……basic than NH3.
(a) more, less
(b) less, more
(c) both (a) and (b)
(d) None of these
Question. Treatment of ammonia with excess of ethyl iodide will yield
(d) tetraethylammonium iodide
Question. Substitution of one alkyl group by replacing hydrogen of primary amines
(a) increases the base strength
(b) decreases the base strength
(c) remains the same
(d) None of the above
Question. Which of the following is not characteristic of amines?
(a) They smell like ammonia
(b) They are inflammable in air
(c) They show the property of hydrogen bonding
(d) They are amphoteric in nature
Question. High basicity of Me2NH relative to Me3N is attributed to:
(a) effect of solvent
(b) inductive effect of Me
(c) shape of Me2NH
(d) shape of Me3N
Question. Which of the following statement is correct ?
(a) Ammonia is more basic than methylamine.
(b) Methylamine is more basic than ammonia.
(c) Dimethylamine is less basic than methylamine.
(d) Dimethylamine is less basic than trimethylamine.
Question. Which of the following factors affect the basic strength of amine?
(i) Inductive effect
(ii) Steric hinderance
(iii) Solvation effect
(iv) Solubility in organic solvents.
(a) (i) and (iv)
(b) (i), (ii) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)
Question. Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?
(a) Reaction of nitrite with LiAlH4.
(b) Reaction of amide with LiAlH4 followed by treatment with water.
(c) Heating alkylhalide with potassium salt of phthalimide followed by hydrolysis.
(d) Treatment of amide with bromine in aquesous solution of sodium hydroxide.
Question. When benzenediazonium chloride in hydrochloric acid reacts with cuprous chloride, then chlorobenzene is formed. The reaction is called
(a) Gattermann reaction
(b) Perkin reaction
(c) Etard reaction
(d) Sandmeyer reaction
Question. The reduction of nitro compounds is most preferred in the presence of
(a) Pd/H2 in ethanol
(b) Sn + HCl
(c) finely divided Ni
(d) iron scrap and HCl.
Question. Aniline is less soluble in water than ethyl amine due to
(a) resonance stablization of benzene ring
(b) resonance stabilization of anilium ion
(c) more hydrophobic nature of C6H5 group than C2H5 group
(d) more hydrophobic nature of C6H5 group than C2H5 group
Question. Amines behave as
(a) lewis acids
(b) lewis bases
(c) aprotic acids
(d) amphoteric compounds
Question. Which statement is not true among the following?
(a) Amines are bases
(b) They turn red litmus blue
(c) Trimethyl amine is less basic than dimethyl amine
(d) Amines yield alcohols on aqueous hydrolysis.
Question. An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound is
Question. Ethylamine reacts with HNO2 giving :
Question. Hinsberg reagent is
Question. Which of the following reagent can be used to convert benzenediazonium chloride into benzene?
Question. Aniline is used
(a) in crimping of wool
(b) in dyeing industry
(c) in making of glue
(d) in fast drying vanish
Question. Which of the following statements about primary amines is ‘False’ ?
(a) Alkyl amines are stronger bases than aryl amines
(b) Alkyl amines react with nitrous acid to produce alcohols
(c) Aryl amines react with nitrous acid to produce phenols
(d) Alkyl amines are stronger bases than ammonia
Question. Reaction of aniline with benzaldehyde is
Question. Hinsberg’s method to separate amines is based on the use of
(a) benzene sulphonyl chloride
(b) benzene sulphonic acid
(c) ethyl oxalate
(d) acetyl chloride
Question. Mark the correct statement
(a) Methylamine is slightly acidic
(b) Methylamine is less basic than ammonia
(c) Methylamine is a stronger base than ammonia
(d) Methylamine forms salts with alkalies.
Question. Which of the following cannot be prepared by Sandmeyer’s reaction?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
Question. Azo dye is prepared by the coupling of phenol and
(a) diazonium chloride
(c) benzoic acid
Question. For carbylamine reaction, we need hot alcoholic KOH and
(a) any primary amine and chloroform
(b) chloroform and silver powder
(c) a primary amine and an alkyl halide
(d) a monoalkylamine and trichloromethane.
Question. Which of the following statements is not correct regarding aniline?
(a) It is less basic than ethylamine
(b) It can be steam-distilled
(c) It reacts with sodium to give hydrogen
(d) It is soluble in water
Question. Aniline and other arylamines are usually colourless but get coloured on storage due to___________.
(d) atmospheric oxidation
Question. When phenol and benzene diazonium chloride are coupled, the main product is :
Question. The amine that does not react with acetyl chloride is
(d) None of these
Question. Primary amines can be distinguished from secondary and tertiary amines by reacting with
(a) Chloroform and alcoholic KOH
(b) Methyl iodide
(c) Chloroform alone
(d) Zinc dust
Question. Which of the following is not correct ?
(a) Ethyl amine and aniline both have – NH2 group
(b) Ethyl amine and aniline dissolve in HCl
(c) Ethyl amine and aniline both react with CHCl3 and KOH to form unpleasant smelling compound
(d) Ethyl amine and aniline both react with HNO2 in cold to give hydroxy compounds
Question. In the diazotization of arylamines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to
(a) Supress the concentration of free aniline available for coupling
(b) Supress hydrolysis of phenol
(c) Ensure a stoichiometric amount of nitrous acid
(d) Neutralise the base liberated
Question. Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride.
Question. N– ethyl benzene sulphonyl amide is strongly acidic and soluble in alkali due to presence of
(a) strong electron donating sulphonyl group.
(b) strong electron withdrawing sulphonyl group.
(c) weak electron donating sulphonyl group.
(d) weak electron withdrawing sulphonyl group.
Question. Diazonium salt is obtained when aniline reacts with :
(a) cold NaOH
(b) NaNO2 and HCl (0–5°C)
(c) SnCl2 at 10°C
(d) N2O at (0 – 5°C)
Question. Acetamide is treated with the following reagents separately. Which one of these would yield methylamine?
(a) NaOH – Br2
(c) Hot conc. H2SO4
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