CBSE Class 12 (Science) Amines — practice questions
85 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 (Science) Amines in the app →Amines are best regarded as derivatives of:The geometry around nitrogen in an amine molecule is:The C to N to E angle in an amine is less than:In the IUPAC system primary amines are named as:Nitro compounds are reduced to amines by hydrogen over:Reduction of nitro compounds with iron scrap uses which acid?Ammonolysis of alkyl halides is carried out in a sealed tube at:The chief drawback of ammonolysis is that it yields a:In ammonolysis the order of reactivity of alkyl halides is:Nitriles reduced with lithium aluminium hydride give:Reduction of a nitrile gives an amine with how many more carbons?Gabriel phthalimide synthesis is used to prepare only:Aromatic primary amines cannot be made by Gabriel synthesis because:Hoffmann bromamide degradation treats an amide with bromine and:The amine from Hoffmann degradation has how many carbons?Lower aliphatic amines are gases carrying a smell that is:Lower aliphatic amines dissolve in water because they form:Which class of amine has no intermolecular hydrogen bonding?The order of boiling points of isomeric amines is:The pKb value of ammonia is:Aromatic amines are weaker bases than ammonia because the aryl group is:Aniline is a resonance hybrid of how many structures?Which reaction is used as a test for primary amines?Hinsberg's reagent used to tell amines apart is:Aniline with bromine water at room temperature gives:The activating power of the amino group is curbed by:Aniline heated with sulphuric acid finally yields:Aniline fails to undergo the Friedel-Crafts reaction because it:Benzenediazonium chloride is made from aniline and nitrous acid at:Replacing the diazo group by chlorine using a copper one salt is the:Introducing halogen using copper powder and a halogen acid is the:Iodobenzene is obtained by treating the diazonium salt with:Coupling of benzenediazonium chloride with phenol gives:Replacing hydrogen atoms of which parent compound with alkyl or aryl groups gives amines?Which feature of the nitrogen atom in an amine makes it basic and nucleophilic?What is the simplest aromatic amine, with a phenyl group bonded to an amino group?Trimethylamine, known for a distinctive fishy smell, is which class of amine?Which amine is mainly responsible for the smell of decaying fish?What happens to the 1H NMR signals of amine N-H protons when D2O is added to the sample?What geometry is characteristic of the nitrogen centre in alkyl amines?Why is nitrogen nearly planar in aromatic amines such as aniline?How do alkyl and aryl groups on nitrogen affect the basicity of an amine?Why is aniline a weaker base than aliphatic amines?Heating ammonia with an alkyl bromide gives what kind of product?The Gabriel synthesis converts primary alkyl halides into which product?Which salt is traditionally alkylated in the Gabriel synthesis?Which reagent is used in the Ing–Manske procedure to free the amine from N-alkylphthalimide?Which reactive species forms in situ when bromine reacts with sodium hydroxide in the Hofmann rearrangement?Which intermediate forms when the bromoamide anion rearranges in the Hofmann rearrangement?Which gas is given off when the carbamic acid decomposes in the Hofmann rearrangement?Which of these can replace bromine as the oxidant in a Hofmann rearrangement?Which alkene is favoured as the Hofmann product in Hofmann elimination?A primary amine heated with chloroform and base gives which compound class?Which reactive intermediate forms from chloroform during the carbylamine reaction?A foul odour after heating a sample with alcoholic KOH and chloroform indicates which type of amine?Which amines give a negative carbylamine test?What is the Hinsberg reagent used to distinguish amines?In the Hinsberg test, what does a primary amine form in aqueous alkali?Acyl chlorides and acid anhydrides react with primary and secondary amines to give what?What do amines form when they react with acids?Which reagent converts aromatic amines into diazonium salts?At what temperature range are diazonium chlorides classically prepared?Who first reported diazotization in 1858?Which counterion makes benzenediazonium salt described as shock insensitive rather than explosive?What is the first and still main use of diazonium salts?Which azo dye is used in the laboratory as a pH indicator?Which coupling partner gives an intensely orange-red dye with a diazonium salt?Which reducing agent converts diazonium salts into hydrazine derivatives?The Sandmeyer reaction converts aryl diazonium salts to aryl halides using which kind of reagent?Which copper reagent in a Sandmeyer reaction converts a diazonium salt into an aryl nitrile?What type of mechanism does the Sandmeyer reaction follow?How is aniline made industrially from nitrobenzene?What forms when bromine water is added to aniline?Why does freshly purified aniline gradually turn yellow or red on standing?Relative to benzene, aniline reacts faster in electrophilic aromatic substitution because it is what?Heating aniline with sulfuric acid at 180 °C produces which compound?Which reducing agent did Nikolay Zinin use in 1842 to convert nitrobenzene to aniline?Which metals are often used in the laboratory to reduce nitroaromatics to anilines?From which amino acids are amine hormones synthesised?Which of these neurotransmitters is an amine?Why can amines of the type NHRR' not be obtained in optical purity?Which pair names a three-membered and a six-membered cyclic amine respectively?The diazonium group is described as among the most strongly what kind of substituent?Why are alkyl diazonium salts of little importance compared with aryl ones?Treating an arenediazonium salt with cuprous cyanide gives which type of compound?