The numbers of primary amines posible for the formula C4H11N is -
1
2
3
4
The product D in the following sequence of reactoins is,
CH3COOH →NH3 A →Heat B →P2O5 C →Na + C2H5OH D :
Ester
Amine
Acid
Alcohol
An aromatic primary amine with cold nitrous acid leads to the formation of:
alcohol
nitrite
diazonium salt
benzene
The least basic aqueous solution among the following is -
(CH3)2NH
CH3NH2
(CH3)3N
C6H5NH2
Which one of the following on reduction with LiAlH4 yields a secondary amine ?
[2007]
Methyl isocyanide
Acetamide
Methyl cyanide
Nitroethane
The IUPAC name of the compound having formula,
O=C—CH—CH2 | | | OH NH2 OH is :
3-Aminohydroxypropionic acid
2-Amino-propan-3-oic acid
Amino hydroxy propionic acid
2-Amino-3-hydroxy propanoic acid
In the reaction,
CH3CN+2H→SnCl2HClX →Boiling H2O Y, the term Y is
[1999]
Acetone
Ethanamine
Acetaldehyde
Dimethyl amine
RMgX on reacting with cyanogen chloride gives:
R-NC
R-Cl
R-CN
None of the above
X and Y in the given reaction are:
CH3COOH + (CH3)2NH
CH3CONH2 + CH3OH
CH3CHO + (CH3)2NH
CH3COCH3 + CH3NH2
Which of the following is the strongest base ?
Primary, secondary and tertiary nitroalkanes can be identifier by the action of:
HNO2 + NaOH(aq)
CHCl3 + NaOH (aq)
CHCl3 + KOH(alc.)
none of these
Consider the following sequence of reactions
Compound[A]→Reduction[B] →HNO3CH3CH2OH
The compound [A] is
CH3CH2CN
CH3NO2
CH3NC
CH3CN
Which of the following statements about primary amines is false ?
[2010]
Alkyl amines are stronger bases than aryl amines
Alkyl amines react with nitrous acid to produce alcohols
Aryl amines react with nitrous acid to produce phenols
Alkyl amines are stronger bases than ammonia
When NaNO2 and dilute HCl were added to an amine at 0°c, a colourless gas was evolved and an ionic compound is formed. The amine is:
any primary amine
an aromatic primary amine
any amine
none of the above
The compound obtained by heating a mixture of primary amine and chloroform with ethanolic potassium hydroxide (KOH) is
[1997]
An alkyl isocyanide
An alkyl halide
An amide
An amide and nitro compound
Identify 'Z' in the change;
C6H5NH2→280KNaNO2/HClX→CuBr/HBrZ:
Among the following, the strongest base is:
p-NO2-C6H4NH2
m-NO2-C2H4NH2
C2H5CH2NH2
A nitrogenous substance X is treated with HNO2 and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be:
CH3CH2NH2
CH3CH2NO2
(CH3)2C(N=O)(NO2)
(CH3)2CHNO2
Alkanamide that gives 1-phenylethylamine on Hoffmann's reaction is:
2-Phenylpropanamide
3-Phenylpropanamide
2-Phenylethanamide
N-Phenylethanamide
The IUPAC name of the given comound is -
1-Methyl-aminopropane
Butan-2-amine
2-Methyl-2-aminopropane
The correct order of increasing reactivity of C-X bond towards nucleophile in the following compound is
I<II<IV<III
II<III<I<IV
IV<III<I<II
III<II<I<IV
Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in presence of dilute hydrochloric acid. The compound so formed is converted into a tertafluoroborate which is subsequently heated. The final product is
1,3,5-tribromobenzene
p-bromofluorobenzene
p-bromoaniline
2,4,6-tribromofluorobenzene
Alkyl halide (RX) on treatment with KCN followed by reduction leads to the formation of:
RNH2
RCH2NH2
RH + NH3
RCH3 + N2
The end product in the following sequence of reactions is -
C2H5NH2→HNO2A →PCl5B→NH3C?
Ethyl cyanide
Ethylamine
Methylamine
CH3CH2NH2 contains a basic NH2 group, but CH3CONH2 does not, because;
acetamide is amphoteric in character
in CH3CH2NH2 the electron pair on N-atom is delocalized by resonance
in CH3CH2NH2 there is no resonance, while in acetamide the lone pair of electron on N-atom is delocalized and therefore less available for protonation
Dehydration of an amide gives:
Cyanide
Isocyanide
Fatty acid
A secondary amine is:
a compound with two -NH2 groups
a compound with 2 carbon atoms and a -NH2 group
a compound with a -NH2 group on the carbon atom in number 2 position
a compound in which 2 of the hydrogens of NH3 have been replaced by alkyl or aryl groups
→NH42SA→0-5°CNaNO2/HClB→∆C2H5OHC
Product (C) is
Nitrobenzene
1,3-Diethoxybenzene
Ethoxybenzene
Benzene
Reaction of R-C||O-NH2 with a mixture of Br2 and KOH gives R-NH2 as the main product. The intermediates involved in this reaction are:
R-C||O-NHBr and R-N=C=O
RCN
R-C||O-NBr2
RNHBr
Please disable the adBlock and continue. Thank you.