Description : Which of the following compounds will react with cyclopentanone to form an enamine?
Last Answer : Which of the following compounds will react with cyclopentanone to form an enamine? A. B. C. D.
Description : Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react ... give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)
Last Answer : They react with chloroform and NaOH to form isocyanides.
Description : Which of the following amines react with nitrous acid to form nitrosoamine? (a) Ethylamine (b) Triethylamine (c) Diethylamine (d) Isopropylamine
Last Answer : Diethylamine
Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes
Last Answer : Alcohols
Description : Alkyl halides react with ammonia in the presence of base to form : (a) primary amines (b) nitrated alkyl halides (c) amides (d) quaternary ammonium salts
Last Answer : primary amines
Description : Which of the following statements is false about primary amines? (a) They can be prepared by reduction of nitriles with LiAlH4. (b) They do not form salts with acids (c) They react with ice-cold nitrous acid to form nitrogen gas. (d) They are basic and soluble in water
Last Answer : They do not form salts with acids
Description : . The reduction of cyclohexanone with LiAlH4 (or NaBH4) will give (a) an alcohol (b) an organic acid (c) an aldehyde (d) a hemiketal
Last Answer : an alcohol
Description : Which of the following is an enamine?
Last Answer : Which of the following is an enamine? A. B. C. D.
Description : Enamine contains ……. a. double bond and amino group b. double bond and alcohol c. dounle bond and amide d. Diamines
Last Answer : a. double bond and amino group
Description : Cyclohexanone oxime is converted into `epsilon`-caprolactam by treatement with
Last Answer : Cyclohexanone oxime is converted into `epsilon`-caprolactam by treatement with A. dil HCl B. `NaOC_(2)H_(5)` C. Ammonia D. conc. `H_(2)SO_(4)`
Description : Phenol on distillation with Zinc dust gives (a) Phenylzinc (b) Benzene (c) Cyclohexanone (d) Benzoic acid
Last Answer : Benzene
Description : Cyclohexanone is an example of: w) an aldehyde x) a carboxylic acid y) an alkyne z) a ketone
Last Answer : ANSWER: Z -- A KETONE
Description : Of the following amines how many can give carbyl amine reaction?
Last Answer : Of the following amines how many can give carbyl amine reaction?
Description : Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.
Last Answer : Ans— a. In pr. Amines, alkyl group increases electron density on the N-atom making it more basic than ammo b. In sec. amine, there are two alkyl groups increase electron density on N-atom more than N-atom in pr. amines in which there is one alkyl group.
Description : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :-
Last Answer : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :- A. 6 B. 7 C. 8 D. 9
Description : n-propylamine containing no secondary and tertiary amines as impurities is prepared by
Last Answer : n-propylamine containing no secondary and tertiary amines as impurities is prepared by A. Hoffmann ... n-propylchloride with ammonia D. none of these
Description : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is
Last Answer : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in ... reaction D. Reaction with `NH_(3)`
Description : The strongest base in aqueous solution among the following amines is :
Last Answer : The strongest base in aqueous solution among the following amines is : A. N,N- ... N-ethylethanamine C. M-methylmethanamine D. ethanamine
Description : Of the following reactions, how many reaction, are used for the preparation of amines? (a) `R-C-=N overset(LiAIh_(4))rarr` (b) `R-overset(O)overset(||
Last Answer : Of the following reactions, how many reaction, are used for the preparation of amines? (a) `R-C-=N overset( ... R-CH_(2)-NO_(2) overset(H_(2),Ni)rarr`
Description : Which of the following amines cannot be prepared by path-I?
Last Answer : Which of the following amines cannot be prepared by path-I? A. B. C. D.
Description : Which of the following amines reacts most rapidly with
Last Answer : Which of the following amines reacts most rapidly with A. B. C. D.
Description : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following
Last Answer : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann ... to accomplish this? A. B. C. D.
Description : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:
Last Answer : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions: A. B. C. D.
Description : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`?
Last Answer : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`? A. `CH_(3)NH_(2)` B. C. D.
Description : The correct sequence regarding base strength of aliphatic amines in aqueous solution is:
Last Answer : The correct sequence regarding base strength of aliphatic amines in aqueous solution is: A. `R_(3)N gt R_(2) NH gt ... gt R_(2)NH gt R_(3)N gt NH_(3)`
Description : Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons
Last Answer : (1) Triesters Explanation: Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters.
Description : Aromatic primary amines are not prepared by gabrial phthalimide synthesis. Why?
Last Answer : Ans:- Because aryl halides donot undergo nucleophilic substitution reaction.
Description : Why tert. Amines donot undergo acylation reaction ?
Last Answer : Ans.-- Tert. Amines donot undergo acylation reaction because they donot have Nattached to H- atom.
Description : Why are amines always less acidic than comparable alcohols?
Last Answer : Ans.--- Amines are less acidic than alcohols because of oxygen higher electronegative & smaller size. Therefore O-H breakes easily than N-H bond.
Description : Can tertiary amines undergo acetylation reactions ? Explain.
Last Answer : For an amine to undergo acetylation, it should have a replaceable hydrogen atom. Tertiary amines cannot undergo acetylation reactions because these do not have replaceable hydrogen atom.
Description : Write the molecular formula of some members of amines.
Last Answer : Name of amine Molecular Formula 1. Methyl amine 2. Ethyl amine CH 3 NH 2 C 2 H 5 NH 2
Description : What are amines? Write their general formula.
Last Answer : Compounds containing –NH 2 as the functional group are called amines. Their general formula is R –NH 2
Description : Chemically hormones are (a) biogenic amines only (b) proteins, steroids and biogenic amines (c) proteins only (d) steroids only.
Last Answer : (b) proteins, steroids and biogenic amines
Description : The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines
Last Answer : primary aromatic amines
Description : When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form
Last Answer : primary amines form
Description : Carbylamine test is given by (a) Primary amines (b) Secondary amines (c) Tertiary amines (d) None of these
Last Answer : Primary amines
Description : Amines are generally classified as (a) Weak acids (b) Strong acids (c) Weak bases (d) Strong bases
Last Answer : Weak bases
Description : Lucas test is used to determine the type of (a) alcohols (b) acids (c) amines (d) carbohydrates
Last Answer : alcohols
Description : The distinctive features of fluoxetine compared to the typical tricyclic antidepressants include the following except: A. It is less likely to produce cardiac arrhythmias in overdose B. It infrequently ... suffering from chronic somatic illness D. It does not block neuronal uptake of biogenic amines
Last Answer : D. It does not block neuronal uptake of biogenic amines
Description : The following is true of selegiline: A. It does not exert antiparkinsonian action unless combined with levodopa B. It overcomes the on-off ' effect in levodopa treated advanced parkinsonian ... D. At doses used in parkinsonism it does not interfere with peripheral metabolism of dietary amines
Last Answer : . At doses used in parkinsonism it does not interfere with peripheral metabolism of dietary amines