JEE Chemistry- Some important points and important questions on organic chemistry Sample Question Paper With Answer Key
Exam Duration: 60 Mins Total Questions : 50
The substance which has been asaigned octane number of -45 is
- (a)
n -octane
- (b)
n -heptane
- (c)
n -nonane
- (d)
None
Which branched chain isomer of the hydrocarbon with molecular mass 72 give only one isomer of mono substituted alky1 halide?
- (a)
neopentane
- (b)
isohexane
- (c)
neohexane
- (d)
tertiany buty1 chloride
For which of the following compounds the Lassaigne's test of nitrogen will fail?
- (a)
H2 NCONH.NH2 HCL
- (b)
H2N.NH2.2HCL
- (c)
NH2 CONH2
- (d)
None
The 1996 Nobel Prize in chemistry goes to
- (a)
F. Curl
- (b)
H.W. Kroto
- (c)
E.Smalley
- (d)
jointly to the above three persons
Which alkyl halide has maximum density?
- (a)
C3H7I
- (b)
C2H5I
- (c)
CH3 I
- (d)
CH3Br
On treating phenol with PC15 the main product is
- (a)
chlorobenzene
- (b)
triphenyl phosphate
- (c)
hexachlorobenzane
- (d)
BHC
Arrange the following compounds in order of increasing dipole moment : Toluene (1); m-dichlorobenzene (II); o-dichlorobenzene (III); and p-dichlorobenzene (IV).
- (a)
I < IV< II< III
- (b)
IV< I < II < III
- (c)
IV < I < III < II
- (d)
IV< II < I < III
Which of these following reagents will convert glycerol to acrolein?
- (a)
P2O5
- (b)
conc.H2SO4
- (c)
KHSO4
- (d)
All the three
Which of the following will react with water?
- (a)
CHCL3
- (b)
CCL3CHO
- (c)
CCL4
- (d)
CLCH2-CH2-Cl
The regent used to convert ethanoic acid to ethanol is
- (a)
LiAlH4
- (b)
BH3
- (c)
PCl3
- (d)
K2Cr2O7/H+
Which of the following is amphoteric acid
- (a)
glycine
- (b)
salicylic acid
- (c)
citric acid
- (d)
lactic acid
The acid which does not from from anhydride when treated with P4O10 is
- (a)
formic acid
- (b)
acetic acid
- (c)
propanoic acid
- (d)
benzoic acid
The compound with mol. mass 180 is acetylated with CH3COCL to get acetylated compound with mol mass 390.the number of amino groups present pre molecule of the compound is
- (a)
2
- (b)
5
- (c)
4
- (d)
6
The reaction \(2CH_{ 3 }COOC_{ 2 }H_{ 5 }\overset { \overset { \_ }{ O } C_{ 2 }H_{ 5 } }{ \longrightarrow } CH_{ 3 }COCH_{ 2 }COOC_{ 2 }H_{ 5 }\) is called
- (a)
perkin
- (b)
Tischenko
- (c)
Claisen
- (d)
schotten Bauman
Mercuric chloride reduced to mrecurous chloride by
- (a)
formic acid
- (b)
ammonia
- (c)
acetic acid
- (d)
benzaldehyde
which of the following is polyprotic acid
- (a)
salicylic acid
- (b)
oxalic acid
- (c)
glycollic acid
- (d)
lactic acid
The product formed on heating sucrose with conc.HNO3 is
- (a)
citric acid
- (b)
lactic acid
- (c)
sucrose nitrate
- (d)
oxalic acid
Wecker method involves the conversion of alkene using PdCl2 into corresponding
- (a)
alcohol
- (b)
ketone
- (c)
aldehyde
- (d)
ether
\(R-N\equiv C+HgO\longrightarrow A+Hg_{ 2 }O;A\quad \)is
- (a)
\(RHN_{ 2 }\)
- (b)
\(RCONH_{ 2 }\)
- (c)
\(R-NCO\)
- (d)
\(RCOOH\)
Alkyl isocyanides contain \(\sigma \) and \(\pi \) bounds
- (a)
\(9\sigma \quad and\quad 3\pi \)
- (b)
\(9\sigma \quad and\quad 9\pi \quad \)
- (c)
\(3\sigma \quad and\quad 4\pi \)
- (d)
\(5\sigma \quad and\quad 7\pi \)
In Fisher-Spier easterification reaction, the order of reactivity of acids followthe sequence
- (a)
\(HCOOH>CH_{ 3 }COOH>\left( CH_{ 3 } \right) _{ 3 }COOH>\left( CH_{ 3 } \right) _{ 2 }COOH\)
- (b)
\(\left( CH_{ 3 } \right) _{ 3 }COOH>\left( CH_{ 3 } \right) _{ 2 }COOH>CH_{ 3 }COOH>HCOOH\)
- (c)
\(CH_{ 3 }COOH>\left( CH_{ 3 } \right) _{ 3 }COOH>(CH_{ 3 })_{ 2 }COOH>HCOOH\)
- (d)
None of these
When glycerol is heated with KHSO4 or ZnCl2 or H2SO4 the product formed is
- (a)
formaldehyde
- (b)
acetaldehyde
- (c)
acrolein
- (d)
None of these
Tertiary butyl methyl ether can be prepared by
- (a)
\(\quad \quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-Br\quad and\quad NaOCH_{ 3 }\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (b)
\(\quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-ONa\quad and\quad CH_{ 3 }Br\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (c)
\(\quad \quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-ONa\quad and\quad C_{ 2 }H_{ 5 }-Br\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (d)
None of the above
Anisole can be prepared byheating
- (a)
C6H5Br and CH3ONa
- (b)
C6H5ONa and CH3Br
- (c)
C6H5ONa and C2H5Br
- (d)
None of these
When ethyl alcohol reacts with diazomethane(CH2N2)in presence of HBF4, th eproduct formed would be
- (a)
Methyl ethyl ether and N2
- (b)
Diethyl ethre and N2
- (c)
methyl alcohol and methyl amine
- (d)
None of the above
2,4 dinitrophenyl hydrazine is called
- (a)
Tollens reagent
- (b)
Bayer's regent
- (c)
Brady's reagent
- (d)
Fehling's solution
An unknown alkyl halide (A) reacts with alcoholic KOH to produce a hydrocorbon C4H8.Ozonolysis of the hydrocorbon affords one mole of propionaldehyde and one mole of formaldehyde.suggest which organic combound among the following is the correct structure of the above alkyl halide (A) :
- (a)
(CH3)3CBr
- (b)
CH3CH(Br)-CHBrCH3
- (c)
CH3CH2CH(Br)CH3
- (d)
Br(CH2)4Br
By the Hydrolysis of 1,1,1-trichloro ethane the product formed is
- (a)
formic acid
- (b)
oxalic acid
- (c)
acitic acid
- (d)
None of the above
methyl magnesium bromide reacts with cyanogen chloride to give
- (a)
Acetonitrile
- (b)
ethane nitrile
- (c)
methyl cyanide
- (d)
All of the above
methyl isocyanide on acid hydrolysis gives
- (a)
acetic acid + NH3
- (b)
methyle amine and formic acid
- (c)
acetic acid and formic acid
- (d)
None is correct
m-dinitroaniline when reduced with ammonium sulphide gives
- (a)
m-diaminobenzene
- (b)
m-nitroaniline
- (c)
aniline
- (d)
None of these
Which of the following reduces Tollens reagent?
- (a)
C2H5NO2
- (b)
C6H5NO
- (c)
C6H5NH2
- (d)
C6H5NHOH
Lacrymator or tear gas is
- (a)
C6H5COCL
- (b)
C6H5OC6H5
- (c)
C6H5COCH2CL
- (d)
C6H5COCH3
Among the given compounds, the most suscribable to nucleophilic attack at the carbonyl group is
- (a)
MeCOCL
- (b)
MeCHO
- (c)
MeCOOMe
- (d)
MeCOOCOMe
Lactic acid on heating with conc.H2SO4 gives
- (a)
acetic acid
- (b)
Propionic acid
- (c)
acrylic acid
- (d)
formic acid
The Major product of nitration of benzoic acid is
- (a)
3-nitrobenzoic acid
- (b)
4-nitrobenzoic acid
- (c)
2-nitrobenzoic acid
- (d)
2,4-dinitrobenzoic acid
The correct IUPAC name of \(HOOC-CH-COOH\\ \quad \quad \quad \quad\ \ |\\ \quad \quad \quad \quad COOH\)
- (a)
tricarboxymathane
- (b)
propane trioic-acid
- (c)
tributanoic acid
- (d)
2-carboxy propane dioic acid
Which one of the following will not show geometrical isomerism?
- (a)
\(C{ H }_{ 3\quad \quad \quad \quad }\quad H\\ \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad C\\ \quad \quad \quad \diagup \quad \diagdown \\ \quad Cl\quad \quad \quad CH=CHC{ H }_{ 3 }\)
- (b)
\(C{ H }_{ 2 }Cl_{ \quad \quad \quad }\quad \quad CH=C{ H }_{ 2 }\\ \quad \quad \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad \quad \quad C\\ \quad \quad \quad \quad \quad \diagup \quad \diagdown \\ \quad \quad \quad H\quad \quad \quad C{ H }_{ 3 }\)
- (c)
\(\quad\quad\quad\quad\quad C{ H }_{ 2 }=CH\quad \quad \quad C{ H }_{ 2 }Cl\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad C\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagup \quad \diagdown \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad H\quad \quad \quad C{ H }=CHCl\)
- (d)
\(\quad C{ H }_{ 3 }CH\quad =\quad CHC{ H }_{ 2 }C{ H }_{ 3 }\)
Ethyne + X \(\underset { \longrightarrow }{ { Ba }^{ 2+ } } \)prop-2 ene -nitrile. Here X is
- (a)
bromine
- (b)
barium cyanide
- (c)
hydrogen bromide
- (d)
hydrogen cyanide
C6H6 \(\overset { [0] }{ \underset { { V }_{ 2 }{ O }_{ 5 } }{ \longrightarrow } } \) X . Here X is
- (a)
maleic anhydride
- (b)
acetic acid
- (c)
propanoic acid
- (d)
succinic acid
RCH2CCl2 R \(\overset { Reagent }{ \longrightarrow } \) RC \(\equiv \) CR .The reagent used is
- (a)
Na
- (b)
HCl / H2O
- (c)
KOH in C2H5OH
- (d)
Zn / alcohol
Which one of the following reagents would not yield alkane?
- (a)
\({ C }_{ 2 }{ H }_{ 5 }OH\quad \overset { HI/Red\ P }{ \underset { { 150 }^{ 0 }C }{\longrightarrow } } \)
- (b)
refluxing butanoic with Zn/Hg-HCl
- (c)
hydrolysis of ethyne
- (d)
electrolysis of sodium proponate solution
C2H5Br \(\overset { AgCN }{ \longrightarrow } \quad X\quad \overset { Reduction }{ \underset { Zn/Hg-HCl }{ \longrightarrow } } \quad Y\) , Y is
- (a)
n-propylamine
- (b)
ethylamine
- (c)
isopropylamine
- (d)
ethylmethylamine
The chemical reaction (CH3)3CBr \(\overset { alc.KOH }{ \longrightarrow } \)(CH3)2CH=CH2 is an example of
- (a)
nucleophilic substitution
- (b)
electrophilic substitution
- (c)
free radical mechanism
- (d)
\(\beta \)-elimination
Diethyl ether , in the presence of light and excess of chlorine gives
- (a)
\(CC{ l }_{ 3 }C{ l }_{ 2 }-O-C{ l }_{ 2 }C{ l }_{ 3 }\)
- (b)
\(\quad\quad\quad\quad Cl\quad \quad \quad\quad \quad Cl \\ \quad \quad \quad \quad \quad |\quad \quad \quad \quad \quad |\\ C{ H }_{ 3 }-CH-O-CH-C{ H }_{ 3 }\)
- (c)
\({ CH }_{ 3 }{ CCl }_{ 2 }-O-CC{ l }_{ 2 }-{ CH }_{ 3 }\)
- (d)
NONE OF THE ABOVE
Which is not true for C=O bond and C=C bond?
- (a)
Both are made up of one \( \delta \) bond and one \(\pi \)-bond
- (b)
Both are planar in nature
- (c)
Both use SP2 hybrid of the C atom for their formation
- (d)
Carbonyl compounds undergo electrophilic addition reaction whereas compounds containing ethylenic double bonds undergo nucleophilic addition reaction
C6H6 \(\overset { conc.{ HNO }_{ 3 } }{ \underset { conc.{ H }_{ 2 }{ SO }_{ 4 }.363K }{ \longrightarrow } \quad } \) X \(\overset { { (NH }_{ 4 })_{ 2 }{ S }_{ x\quad } }{ \longrightarrow } Y\)
In the above sequence X and Y are
- (a)
nitrobenzene ,aniline
- (b)
m-dinitrobenzene , m -phenylene diamine
- (c)
m-dinitrobenzene and m-nitroaniline
- (d)
p-dinitrobenzene, p-nitroaniline
Phenol \(\overset { Zn }{ \underset { distillation }{ \longrightarrow } } \quad A\quad \overset { conc.HN{ O }_{ 3 } }{ \underset { conc.{ H }_{ 2 }{ SO }_{ 4 }.333K }{ \longrightarrow } } \quad B\quad \overset { Zn }{ \underset { NaOH }{ \longrightarrow } } \quad C\)
In the above reaction A , B and C are
- (a)
benzene,nitrobenzene,aniline
- (b)
benzene,m-dinitrobenzene,m-nitroaniline
- (c)
toulene ,m-nitrotoluene,m-toluidine
- (d)
benzene,nitrobenzene,hydrazobenzene
Iodoform can be prepared from all except
- (a)
isopropyl alcohol
- (b)
3-methyl 2-butanone
- (c)
iso-butyl alcohol
- (d)
ethyl methyl ketone
Identify Z in the series
\(C_3H_7OH\xrightarrow[160°-180°C]{conc.H_2SO_4}X\xrightarrow{Br_2}Y\xrightarrow[alc.KOH]{Excess of}Z\)
- (a)
\(CH_3-CH-CH_2\\\quad\quad\quad\ |\ \ \quad\quad|\\\quad \quad \quad NH_2\ \ \ NH_2\)
- (b)
\(CH_3-CH-CH_2\\\quad\quad\quad\ |\quad\quad\ \ |\\\quad\quad\quad OH\quad\ OH\)
- (c)
\(CH_3-C=CH_2\\\quad\quad\quad\ |\\\quad\quad\quad\ OH\)
- (d)
\(CH_3-C\equiv CN\)
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