11242 + Mcqs in Chemistry Page 38 McqOptions

1851.	Which of the following possess powerful mustard smell (and are called mustard oils)
A.	Alkyl isocyanates
B.	Alkyl cyanates
C.	Alkyl isothiocyanates
D.	Alkyl thiocyanates
Answer» D. Alkyl thiocyanates

Discussion

1852.	Secondary nitro compounds when react with \[HN{{O}_{2}}\] forms crystalline solids which one on treatment with NaOH gives
A.	Red solution
B.	Blue solution
C.	White precipitate
D.	Yellow colouration
Answer» C. White precipitate

Discussion

1853.	Primary nitro compounds when react with \[HN{{O}_{2}}\] forms crystalline solids which on treatment with NaOH gives
A.	Red solution
B.	Blue solution
C.	White precipitate
D.	Yellow coloration
Answer» B. Blue solution

Discussion

1854.	In the mustard oil reaction, an amine is treated with
A.	\[Na\,/\,{{C}_{2}}{{H}_{5}}OH\]
B.	\[Sn\,/\,HCl\]
C.	\[C{{S}_{2}}\]
D.	\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}\]
Answer» D. \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}\]

Discussion

1855.	By the presence of a halogen atom in the ring, basic properties of aniline is
A.	Increased
B.	Decreased
C.	Unchanged
D.	Doubled
Answer» B. Decreased

Discussion

1856.	By reduction of nitrosobenzene which of the following is not obtained
A.
B.
C.
D.
Answer» E.

Discussion

1857.	In the explosive amatol, TNT is mixed with [CPMT 1988]
A.	Ammonium citrate
B.	Ammonium nitrate
C.	Ammonium oxalate
D.	Ammonium sulphate
Answer» C. Ammonium oxalate

Discussion

1858.	Which of the following compounds is an amino acid [Manipal MEE 1995]
A.	\[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-O-N{{H}_{4}}\]
B.	\[C{{H}_{3}}-\underset{N{{H}_{2}}\,}{\mathop{\underset{\|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-OH\]
C.	\[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-N{{H}_{2}}\]
D.	\[C{{H}_{3}}-\underset{N{{H}_{2}}\,\,}{\mathop{\underset{\|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-Cl\]
Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-N{{H}_{2}}\]

Discussion

1859.	The maximum number of \[-N{{O}_{2}}\] groups that can be introduced by nitration in benzene is usually
A.	4
B.	2
C.	3
D.	6
Answer» D. 6

Discussion

1860.	'Oil of mirbane' is
A.	Aniline
B.	Nitrobenzene
C.	p-nitroaniline
D.	p-aminoazobenzene
Answer» C. p-nitroaniline

Discussion

1861.	Which of the following is azo- group
A.	\[-N=\]
B.	\[-N=N-\]
C.	\[-NH-\]
D.	\[-CO-NH-\]
Answer» C. \[-NH-\]

Discussion

1862.	The product of mustard oil reaction is
A.	Alkyl isothiocyanate
B.	Dithio carbonamide
C.	Dithio ethylacetate
D.	Thioether
Answer» B. Dithio carbonamide

Discussion

1863.	A solution of methyl amine
A.	Turns blue litmus red
B.	Turns red litmus blue
C.	Does not affect red or blue litmus
D.	Bleaches litmus
Answer» C. Does not affect red or blue litmus

Discussion

1864.	Which of following is not an usual method for preparation of primary amine
A.	Hofmann's method
B.	Curtius reaction
C.	Schmidt reaction
D.	Friedel-Craft's reaction
Answer» E.

Discussion

1865.	Which of following do not react with \[HN{{O}_{2}}\]
A.	Primary nitroalkanes
B.	Secondary nitroalkanes
C.	Tertiary nitroalkanes
D.	All of these
Answer» D. All of these

Discussion

1866.	Primary amines can be distinguished from secondary and tertiary amines by reacting with [CPMT 1983]
A.	Chloroform and alcoholic KOH
B.	Methyl iodide
C.	Chloroform alone
D.	Zinc dust
Answer» B. Methyl iodide

Discussion

1867.	Which of the following compound is expected to be most basic [NCERT 1982]
A.	Aniline
B.	Methylamine
C.	Hydroxylamine
D.	Ethylamine
Answer» E.

Discussion

1868.	Chloroform when treated with aniline and alcoholic KOH gives [CPMT 1986; EAMCET 1992; MP PMT 1997; Pb. PMT 1999]
A.	Phenyl cyanide
B.	Phenyl isocyanide
C.	Chlorobenzene
D.	Phenol
Answer» C. Chlorobenzene

Discussion

1869.	Which one is weakest base [BHU 1982; RPMT 2000]
A.	Ammonia
B.	Methylamine
C.	Dimethylamine
D.	Trimethylamine
Answer» B. Methylamine

Discussion

1870.	When primary amines are treated with HCl, the product obtained is
A.	An alcohol
B.	A cyanide
C.	An amide
D.	Ammonium salt
Answer» E.

Discussion

1871.	Nitrobenzene on nitration gives [NCERT 1978; CPMT 1989]
A.	o-dinitrobenzene
B.	p-dinitrobenzene
C.	m-dinitrobenzene
D.	o- and p-nitrobenzene
Answer» D. o- and p-nitrobenzene

Discussion

1872.	The correct order of basicity in amines (i) \[{{C}_{4}}{{H}_{5}}N{{H}_{2}}\] (ii) \[C{{H}_{3}}N{{H}_{2}}\] (iii) \[{{(C{{H}_{3}})}_{2}}NH\] (iv) \[{{(C{{H}_{3}})}_{3}}N\] [Kerala CET 2005]
A.	(i) < (iv) < (ii) < (iii)
B.	(iv) < (iii) < (ii) < (i)
C.	(i) < (ii) < (iii) < (iv)
D.	(ii) < (iii) < (iv) < (i)
E.	(iv) < (iii) < (ii) < (i)
Answer» B. (iv) < (iii) < (ii) < (i)

Discussion

1873.	Identify the product in following order 3,4,5-Tribromoaniline\[\underset{\text{(ii) }{{H}_{3}}P{{O}_{2}}}{\mathop{\xrightarrow{\text{(i) diazotization}}}}\,\,?\] [Kerala CET 2005]
A.	3, 4,5 ?Tribromobenzene
B.	1, 2, 3 ? Tribromobenzene
C.	2, 4, 6 ? Tribromobenzene
D.	3, 4, 5 ? Tribromo nitro benzene
E.	3, 4, 5 ? Tribromo phenol
Answer» C. 2, 4, 6 ? Tribromobenzene

Discussion

1874.	Nitration of aniline also gives m-nitro aniline, in strong acidic medium because [Kerala CET 2005]
A.	In electrophilic substitution reaction amino group is meta directive
B.	Inspite of substituents nitro group always goes to m- position
C.	In strong acidic medium, nitration of aniline is a nucleophic substitution reaction
D.	In strong acidic medium aniline present as anilinium ion
E.	Strong acid, gives nitrate anion, which attacks at m-position
Answer» E. Strong acid, gives nitrate anion, which attacks at m-position

Discussion

1875.	Which of the following is secondary pollulant. [BHU 2005]
A.	CO2
B.	N2O
C.	PAN
D.	SO2
Answer» D. SO2

Discussion

1876.	When acetamide is treated with \[HN{{O}_{2}},\] the gas is evolved [CPMT 1993]
A.	\[{{H}_{2}}\]
B.	\[{{O}_{2}}\]
C.	\[{{N}_{2}}\]
D.	\[C{{H}_{4}}\]
Answer» D. \[C{{H}_{4}}\]

Discussion

1877.	\[R-NH-COH\underset{\text{pyridine}}{\mathop{\xrightarrow{POC{{l}_{3}}}}}\,\]product In the given reaction what will be the product [BHU 2005]
A.	R ? N = C = O
B.	\[R-\overset{+}{\mathop{N}}\,\equiv {{C}^{-}}\]
C.	\[R-C\equiv N\]
D.	None of these.
Answer» C. \[R-C\equiv N\]

Discussion

1878.	Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compounds if water during the reaction is continuously removed. The compound formed is generally known as [AIEEE 2005]
A.	A Schiff?s base
B.	An enamine
C.	An imine
D.	An amine
Answer» C. An imine

Discussion

1879.	In the reaction \[C{{H}_{3}}CN+2H\underset{\text{Ether}}{\mathop{\xrightarrow{HCl}}}\,X\underset{{{H}_{2}}O}{\mathop{\xrightarrow{\text{Boiling}}}}\,Y;\] the term Y is: [BHU 2004]
A.	Acetone
B.	Ethyl amine
C.	Acetaldehyde
D.	Dimethyl amine
Answer» D. Dimethyl amine

Discussion

1880.	\[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xrightarrow{NaN{{O}_{2}}HCl}X\xrightarrow{C{{u}_{2}}{{(CN)}_{2}}}Y\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Z\] Z is identified as : [Pb. PMT 2004]
A.	\[{{C}_{6}}{{H}_{5}}-NH-C{{H}_{3}}\]
B.	\[{{C}_{6}}{{H}_{5}}-COOH\]
C.	\[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-N{{H}_{2}}\]
D.	\[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-COOH\]
Answer» C. \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-N{{H}_{2}}\]

Discussion

1881.	Azo dye is prepared by the coupling of phenol and : [Pb. CET 2000]
A.	Diazonium chloride
B.	o-nitro aniline
C.	Benzoic acid
D.	Chlorobenzene
Answer» B. o-nitro aniline

Discussion

1882.	The reduction of which of the following compound would yield secondary amine? [DCE 2004]
A.	Alkyl nitrite
B.	Carbylamine
C.	Primary amine
D.	Secondary nitro compound
Answer» C. Primary amine

Discussion

1883.	Among the following compounds \[{{C}_{3}}{{H}_{7}}N{{H}_{2}},\] \[N{{H}_{3}},C{{H}_{3}}N{{H}_{2}},\]\[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\] and \[{{C}_{6}}{{H}_{5}}N{{H}_{2}},\] the least basic compound is
A.	\[{{C}_{3}}{{H}_{7}}N{{H}_{2}}\]
B.	\[N{{H}_{3}}\]
C.	\[C{{H}_{3}}N{{H}_{2}}\]
D.	\[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]
E.	\[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]
Answer» E. \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]

Discussion

1884.	Electrolytic reduction of nitrobenzene in weakly acidic medium gives [CBSE PMT 2005]
A.	Aniline
B.	Nitrosobenzene
C.	N-Phenylhydroxylamine
D.	p-Hydroxylaniline
Answer» B. Nitrosobenzene

Discussion

1885.	Reaction of primary amines with aldehyde yields [NCERT 1984; Manipal MEE 1995]
A.	Amides
B.	Aldimines
C.	Nitriles
D.	Nitro compounds
Answer» C. Nitriles

Discussion

1886.	Which one of the following methods is neither meant for the synthesis nor for separation of amines [AIEEE 2005]
A.	Hinsberg method
B.	Hofmann method
C.	Wurtz reaction
D.	Curtius reaction
Answer» D. Curtius reaction

Discussion

1887.	Which one of the following compound is most basic? [UPSEAT 2004]
A.	A
B.	B
C.	C
D.	All are equally basic
Answer» C. C

Discussion

1888.	Aniline reacts with which of these to form Schiff base [AFMC 2004]
A.	Acetic acid
B.	Benzaldehyde
C.	Acetone
D.	\[N{{H}_{3}}\]
Answer» C. Acetone

Discussion

1889.	Among the following which one does not act as an intermediate in Hofmann rearrangement [AIIMS 2005]
A.	\[RNCO\]
B.	\[RCO\overset{\,.\ .}{\mathop{N}}\,\]
C.	\[RCO\overset{\,.\ .}{\mathop{N}}\,HBr\]
D.	\[RNC\]
Answer» E.

Discussion

1890.	Benzamide on reaction with \[POC{{l}_{3}}\] gives [IIT-JEE 2004]
A.	Aniline
B.	Chlorobenzene
C.	Benzyl amine
D.	Benzonitrile
Answer» E.

Discussion

1891.	A nitrogen containing organic compound gave an oily liquid on heating with bromine and potassium hydroxide solution. On shaking the product with acetic anhydride, an antipyretic drug was obtained. The reactions indicate that the starting compound is [KCET 2004]
A.	Aniline
B.	Benzamide
C.	Acetamide
D.	Nitrobenzene
Answer» C. Acetamide

Discussion

1892.	Which one doesn't liberate \[N{{H}_{3}}\] when undergoes hydrolysis [Orissa JEE 2005]
A.	Acetanilide
B.	Acetonitrile
C.	Acetamide
D.	Phenyl isocyanide
Answer» E.

Discussion

1893.	Which of the following compound reacts with chloroform and a base to form phenyl isocyanide? [MHCET 2003]
A.	Phenol
B.	Aniline
C.	Benzene
D.	Nitro benzene
Answer» C. Benzene

Discussion

1894.	Complete the following reaction : [MHCET 2004] \[R\,\,N{{H}_{2}}+{{H}_{2}}S{{O}_{4}}\to \]
A.	\[{{[R\,\,N{{H}_{3}}]}^{+}}HSO_{4}^{-}\]
B.	\[[R\,\,N{{H}_{3}}]_{2}^{+}SO_{4}^{2-}\]
C.	\[R\,\,N{{H}_{2}}.{{H}_{2}}S{{O}_{4}}\]
D.	No reaction
Answer» C. \[R\,\,N{{H}_{2}}.{{H}_{2}}S{{O}_{4}}\]

Discussion

1895.	Which of the following amines would undergo diazotisation
A.	Primary aliphatic amines
B.	Primary aromatic amines
C.	Both A and B
D.	None of these
Answer» C. Both A and B

Discussion

1896.	Among the following the weakest base is [AIIMS 2003]
A.	\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\]
B.	\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}NHC{{H}_{3}}\]
C.	\[{{O}_{2}}N\,C{{H}_{2}}N{{H}_{2}}\]
D.	\[C{{H}_{3}}NH\,CHO\]
Answer» C. \[{{O}_{2}}N\,C{{H}_{2}}N{{H}_{2}}\]

Discussion

1897.	Nitrobenzene gives N-phenylhydroxylamine by [AIIMS 2003]
A.	\[Sn/HCl\]
B.	\[{{H}_{2}}/Pd-C\]
C.	\[Zn/NaOH\]
D.	\[Zn/N{{H}_{4}}Cl\]
Answer» E.

Discussion

1898.	The correct order of increasing basic nature for the bases \[N{{H}_{3}},\,C{{H}_{3}}N{{H}_{2}}\] and \[{{(C{{H}_{3}})}_{2}}NH\] is [AIEEE 2003]
A.	\[C{{H}_{3}}N{{H}_{2}}<N{{H}_{3}}<{{(C{{H}_{3}})}_{2}}NH\]
B.	\[{{(C{{H}_{3}})}_{2}}NH<N{{H}_{3}}<C{{H}_{3}}N{{H}_{2}}\]
C.	\[N{{H}_{3}}<C{{H}_{3}}N{{H}_{2}}<{{(C{{H}_{3}})}_{2}}NH\]
D.	\[C{{H}_{3}}N{{H}_{2}}<{{(C{{H}_{3}})}_{2}}NH<N{{H}_{3}}\]
Answer» D. \[C{{H}_{3}}N{{H}_{2}}<{{(C{{H}_{3}})}_{2}}NH<N{{H}_{3}}\]

Discussion

1899.	The final product C, obtained in this reaction Would be [CBSE PMT 2003]
A.
B.
C.
D.
Answer» E.

Discussion

1900.	The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I) benzene (II) and nitrobenzene (III) is [CBSE PMT 2003]
A.	I > II > III
B.	III > II > I
C.	II > III > I
D.	I < II > III
Answer» B. III > II > I

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Which of the following possess powerful mustard smell (and are called mustard oils)

Secondary nitro compounds when react with \[HN{{O}_{2}}\] forms crystalline solids which one on treatment with NaOH gives

Primary nitro compounds when react with \[HN{{O}_{2}}\] forms crystalline solids which on treatment with NaOH gives

In the mustard oil reaction, an amine is treated with

By the presence of a halogen atom in the ring, basic properties of aniline is

By reduction of nitrosobenzene which of the following is not obtained

In the explosive amatol, TNT is mixed with [CPMT 1988]

Which of the following compounds is an amino acid [Manipal MEE 1995]

The maximum number of \[-N{{O}_{2}}\] groups that can be introduced by nitration in benzene is usually

'Oil of mirbane' is

Which of the following is azo- group

The product of mustard oil reaction is

A solution of methyl amine

Which of following is not an usual method for preparation of primary amine

Which of following do not react with \[HN{{O}_{2}}\]

Primary amines can be distinguished from secondary and tertiary amines by reacting with [CPMT 1983]

Which of the following compound is expected to be most basic [NCERT 1982]

Chloroform when treated with aniline and alcoholic KOH gives [CPMT 1986; EAMCET 1992; MP PMT 1997; Pb. PMT 1999]

Which one is weakest base [BHU 1982; RPMT 2000]

When primary amines are treated with HCl, the product obtained is

Nitrobenzene on nitration gives [NCERT 1978; CPMT 1989]

The correct order of basicity in amines (i) \[{{C}_{4}}{{H}_{5}}N{{H}_{2}}\] (ii) \[C{{H}_{3}}N{{H}_{2}}\] (iii) \[{{(C{{H}_{3}})}_{2}}NH\] (iv) \[{{(C{{H}_{3}})}_{3}}N\] [Kerala CET 2005]

Identify the product in following order 3,4,5-Tribromoaniline\[\underset{\text{(ii) }{{H}_{3}}P{{O}_{2}}}{\mathop{\xrightarrow{\text{(i) diazotization}}}}\,\,?\] [Kerala CET 2005]

Nitration of aniline also gives m-nitro aniline, in strong acidic medium because [Kerala CET 2005]

Which of the following is secondary pollulant. [BHU 2005]

When acetamide is treated with \[HN{{O}_{2}},\] the gas is evolved [CPMT 1993]

\[R-NH-COH\underset{\text{pyridine}}{\mathop{\xrightarrow{POC{{l}_{3}}}}}\,\]product In the given reaction what will be the product [BHU 2005]

Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compounds if water during the reaction is continuously removed. The compound formed is generally known as [AIEEE 2005]

In the reaction \[C{{H}_{3}}CN+2H\underset{\text{Ether}}{\mathop{\xrightarrow{HCl}}}\,X\underset{{{H}_{2}}O}{\mathop{\xrightarrow{\text{Boiling}}}}\,Y;\] the term Y is: [BHU 2004]

\[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xrightarrow{NaN{{O}_{2}}HCl}X\xrightarrow{C{{u}_{2}}{{(CN)}_{2}}}Y\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Z\] Z is identified as : [Pb. PMT 2004]

Azo dye is prepared by the coupling of phenol and : [Pb. CET 2000]

The reduction of which of the following compound would yield secondary amine? [DCE 2004]

Among the following compounds \[{{C}_{3}}{{H}_{7}}N{{H}_{2}},\] \[N{{H}_{3}},C{{H}_{3}}N{{H}_{2}},\]\[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\] and \[{{C}_{6}}{{H}_{5}}N{{H}_{2}},\] the least basic compound is

Electrolytic reduction of nitrobenzene in weakly acidic medium gives [CBSE PMT 2005]

Reaction of primary amines with aldehyde yields [NCERT 1984; Manipal MEE 1995]

Which one of the following methods is neither meant for the synthesis nor for separation of amines [AIEEE 2005]

Which one of the following compound is most basic? [UPSEAT 2004]

Aniline reacts with which of these to form Schiff base [AFMC 2004]

Among the following which one does not act as an intermediate in Hofmann rearrangement [AIIMS 2005]

Benzamide on reaction with \[POC{{l}_{3}}\] gives [IIT-JEE 2004]

A nitrogen containing organic compound gave an oily liquid on heating with bromine and potassium hydroxide solution. On shaking the product with acetic anhydride, an antipyretic drug was obtained. The reactions indicate that the starting compound is [KCET 2004]

Which one doesn't liberate \[N{{H}_{3}}\] when undergoes hydrolysis [Orissa JEE 2005]

Which of the following compound reacts with chloroform and a base to form phenyl isocyanide? [MHCET 2003]

Complete the following reaction : [MHCET 2004] \[R\,\,N{{H}_{2}}+{{H}_{2}}S{{O}_{4}}\to \]

Which of the following amines would undergo diazotisation

Among the following the weakest base is [AIIMS 2003]

Nitrobenzene gives N-phenylhydroxylamine by [AIIMS 2003]

The correct order of increasing basic nature for the bases \[N{{H}_{3}},\,C{{H}_{3}}N{{H}_{2}}\] and \[{{(C{{H}_{3}})}_{2}}NH\] is [AIEEE 2003]

The final product C, obtained in this reaction Would be [CBSE PMT 2003]

The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I) benzene (II) and nitrobenzene (III) is [CBSE PMT 2003]