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JEE Questions for Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 6 - MCQExams.com
JEE
Chemistry
Organic Chemistry Some Basic Principles And Techniques
Quiz 6
In Kjeldahl’s method, when nitrogenous organic compound is heated with con. sulphuric acid, the nitrogen is converted into
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0%
(NH4)2 SO4
0%
NH4OH
0%
NH3
0%
None
In the estimation of halogen by Carius method, the halogen of the organic compound is converted into
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0%
Silver nitrate
0%
Silver halide
0%
Silver Sulphate
0%
Silver oxide
In Carius method of estimation of halogen, 0.15 gm of an organic compound gave 0.12 gm of AgBr. Calculate % of bromine in the compound.
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0%
34.04%
0%
17.02%
0%
53.19%
0%
18.8%
In estimation of Sulpur in organic compound, the amount of sulphur is determined in terms of
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0%
H2SO4
0%
BaSO4
0%
SO2
0%
SO3
In estimation sulphur, 0.157 gm of an organic compound gave 0.4813 gm of barium Sulphate. Calculate % S in compound.
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0%
24.10 %
0%
14.20%
0%
42.10%
0%
38%
Suggest a method to purify camphor containing impurity of comman salt.
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0%
Crystallisation
0%
Fractional crytallisation
0%
Sublimation
0%
Distillation
Suggest a method to separate a mixture of ortho and para nitro aniline.
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0%
Distillation
0%
Chromotography
0%
Differential extraction
0%
All of these
Suggest a method to separate a mixture of methanol and acetone.
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0%
Simple distillation
0%
Fractional distillation
0%
Fractional Crystallisation
0%
Differential extraction
Suggest a method to purify napthalene.
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0%
Sublimation
0%
Crystallisation
0%
Differential extraction
0%
Distillation
Suggest a method to separate a mixture containing acetone and ethanol
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0%
Sublimation
0%
Crystallisation
0%
Differential extraction
0%
Distillation
Which of the following compound will not give positive Lassaigne test for nitrogen ?
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Hydrazine
0%
urea
0%
ethylamine
0%
nitroethane
Name a suitable technique of separation of a mixture of calcium sulphate and camphor.
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0%
Crystallisation
0%
Sublimation
0%
Distillation
0%
None
Name the method used to separate a mixture of iodine and sodium chloride ?
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0%
Crystallisation
0%
Fractional Crystallisation
0%
Sublimation
0%
Steam distillation
What conclusion can be drawn if red colour is obtained during Lassaigne test ?
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Pressure of S
0%
Pressure of N
0%
both 1 and 2
0%
Neither 1 and 2
Two volatile liquids A and B different their boiling points by 15 K. Which process can be used for their separation ?
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0%
Fractional distillation
0%
Steam distillation
0%
Distillation under reduced pressure
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Simple distillation
An organic compound from its aqueous solution can be seprated by
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Distillation
0%
Solvent extraction
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Fractional distillation
0%
Steam distillation
Which of the following compound gives blood red colouration when its Lassaigne extract is treated with alkali and ferric chloride ?
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Thiourea
0%
Diphenyl Sulphide
0%
Phenyl hydrazine
0%
Benzomide
Which of the following compounds will give Lassaigne test for nitrogen ?
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NH2NH2
0%
NaNO3
0%
NH4Cl
0%
NaCN
Which of the folowing will give bloodred colour while doing Lassaigne test for nitrogen
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0%
urea
0%
Benzene sulphonic acid
0%
Hydrazine
0%
p-aminobenzene sulphonic acid
Name the method used to determine the molecular weight of organic compound.
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Silver salt method
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Chloroplatinate salt method
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Mass spectrometery
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All of these
0.306 gm of the silver salt of a monobasic organic acid yields 0.216 gm of Silver on ignition. Find molecular weight of the acid.
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0%
46
0%
23
0%
122
0%
20
1.026 gm of the silver salt of a Tribasic organic acid gave an ignition 0.648 gm silver. Find molecular weight of the acid.
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0%
148
0%
192
0%
208
0%
234
Chromatography is used for the purification of
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0%
solids
0%
liquids
0%
gases
0%
All of these
The presence of halogen in an organic compound is detected by
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Iodo form test
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Silver mirror test
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Beilstein’s test
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Millon’s test
Which of the following pairs has the same percentage of carbon ?
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CH3COOH & C2H5OH
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C6H12O6 & C12H22O11
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HCOOCH3 & C12H22O11
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CH3COOH & C6H12O6
How will you separate a solution of benzene and chloroform ?
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0%
Sublimation
0%
Filtration
0%
Distillation
0%
Crystallisation
When 32.25 gm ethyl chloride dehydrogenated it gives 50% alkene. What is the mass of product ?
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7 gm
0%
14 gm
0%
21 gm
0%
28gm
How much sulphur is present in organic compound if on analysis 0.53 gm of this compound gives 1.158gm of BaSO
4
?
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0%
10%
0%
20%
0%
30%
0%
40%
Which method can be used to separate a mixture of KCl and KClO
3
?
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0%
Crystallisation
0%
Fractional Crystallisation
0%
Sublimation
0%
Distillation
Middle ton’s test is used to detect
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0%
N
0%
P
0%
X
0%
S
An organic compound weighing 4.337 mg yielded 10.35 mg of CO
2
and 3.42 mg of H
2
O on oxidation with CuO. Calculate the empirical formula of the compound.
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0%
C3H5
0%
C3H5O
0%
C4H6O
0%
C10H16O3
An organic compound contains 69% C and 4.8% H, the remainder being oxygen. Calculate the masses of CO
2
and H
2
O produced when 0.2 gm of this substance is completely combusted.
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0.506g & 0.864g
0%
0.0864g & 0.0506g
0%
0.506g & 0.0684g
0%
0.506g & 0.0864g
0.3780 gm of chlorine containing organic compound gave 0.5740 gm of silver chloride in Carius estimation. Calculate the % of Cl.
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0%
37.56%
0%
40.5%
0%
35.7%
0%
31.23%
In the estimation of sulphur by Carius method, 0.468 gm of organic compound gave 0.668 gm BaSO
4
. Calculate % of S.
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0%
19.6
0%
21.7
0%
17.9
0%
16.9
Statement (A)
: Vapour density and density both are same
Reason (R)
: Molecular weight is twice the density
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If both A and R are true, and reason is the true explanation of the assertion.
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If both A and R are true, but R is not the true explanation of the A.
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If A is true but R is false.
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If both A and R are false.
Statement (A)
: Lassaigne’s test is shown by diazonium salts.
Reason (R)
: Diazonium salts are volatile.
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If both A and R are true, and reason is the true explanation of the assertion.
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If both A and R are true, but R is not the true explanation of the A.
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If A is true but R isfalse.
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If both A and R are false.
Name of following compound according to IUPAC nomenclature is
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4–methoxy–2–nitrobenzaldehyde
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4–formyl–3–nitroanisole
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4–methoxy–6–nitrobenzaldehyde
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2–formyl–5–methylnitrobenzene
The IUPAC name of the compound is :
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5-formylhex-2-en-3-one
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5-methyl-4-oxohex-2-en-5-al
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3-keto-2-methylhex-5-enal
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3-keto-2-methylhex-4-enal
IUPAC name of
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2–ethyl butene
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2–ethyl but–2–ene
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3–methyl pent–2–ene
0%
None of these
The IUPAC name of CH
3
CHOHCH
2
CH(CH
3
)CHO is
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2–hydroxy–4–methyl–pentanal
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4–hydroxy–2–methyl–pentanal
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2–hydroxy–2–methyl–pentanal
0%
2–methyl–pent–4–ol–l–al
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but–3–enoic acid
0%
but–l–enoic acid
0%
pent–4–enoic acid
0%
prop–2–enoic acid
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2-ethylprop-2- en-1 -ol
0%
2-hydroxymethylbutan-l-ol
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2-methylenebutan-l-ol
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2-ethyl-3 -hydroxyprop-1 -en
The IUPAC name of the following compound, is
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4-bromo-3-cyanophenol
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2-bromo-5-hydroxybenzonitrile
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2-cyano-4-hydroxybromobenzene
0%
6-bromo-3-hydroxybenzonitrile
IUPAC name of (CH
3
)
3
CCl is
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n-butylchloride
0%
3-chlorobutane
0%
2-chloro- 2-methyl propane
0%
t-butyl chloride
The correct IUPAC name of the following acid is
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Z-3-ethyl-4-methylhex-3-en-1-oic acid
0%
Z-3-ethyl-4-methylhexanoic acid
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Z-3,4-diethylpent-3-en-l-oic acid
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E-3-ethyl-4-methylhex-4-en-l-oic acid
0%
E-3-ethyl-4-methylhex-3-en-l-oic acid
Pick out the correct statement from the following and choose the correct answer from the codes given below. I. Hexa-1, 5-diene is a conjugated diene. II. Prop-1, 2-diene is conjugated diene. III. Hexa-1, 3-diene is a conjugated diene. IV. Buta-1, 3-diene is an isolated diene. V. Prop-1, 2-diene is a cummulative diene.
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0%
I, II
0%
II, III
0%
IV, V
0%
II, V
0%
III, V
The correct name for the following hydrocarbon is
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tricyclo (4.1.heptane
0%
bicyclo (5.2.heptane
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bicyclo (4.1.heptane
0%
bicyclo (4.1.hexane
Write the IUPAC name of
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3–methoxybutane
0%
2–methoxybutane
0%
3–methyl–3–methoxypropane
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butoxy methane
The IUPAC name of
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ethoxy propane
0%
1, 1–dimethyl ether
0%
2–ethoxy–iso–propane
0%
2–ethoxy propane
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
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0%
2)
0%
0%
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