JEE Questions for Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 6 - MCQExams.com

In Kjeldahl’s method, when nitrogenous organic compound is heated with con. sulphuric acid, the nitrogen is converted into
  • (NH4)2 SO4
  • NH4OH
  • NH3
  • None
In the estimation of halogen by Carius method, the halogen of the organic compound is converted into
  • Silver nitrate
  • Silver halide
  • Silver Sulphate
  • 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.
  • 34.04%
  • 17.02%
  • 53.19%
  • 18.8%
In estimation of Sulpur in organic compound, the amount of sulphur is determined in terms of
  • H2SO4
  • BaSO4
  • SO2
  • SO3
In estimation sulphur, 0.157 gm of an organic compound gave 0.4813 gm of barium Sulphate. Calculate % S in compound.
  • 24.10 %
  • 14.20%
  • 42.10%
  • 38%
Suggest a method to purify camphor containing impurity of comman salt.
  • Crystallisation
  • Fractional crytallisation
  • Sublimation
  • Distillation
Suggest a method to separate a mixture of ortho and para nitro aniline.
  • Distillation
  • Chromotography
  • Differential extraction
  • All of these
Suggest a method to separate a mixture of methanol and acetone.
  • Simple distillation
  • Fractional distillation
  • Fractional Crystallisation
  • Differential extraction
Suggest a method to purify napthalene.
  • Sublimation
  • Crystallisation
  • Differential extraction
  • Distillation
Suggest a method to separate a mixture containing acetone and ethanol
  • Sublimation
  • Crystallisation
  • Differential extraction
  • Distillation
Which of the following compound will not give positive Lassaigne test for nitrogen ?
  • Hydrazine
  • urea
  • ethylamine
  • nitroethane
Name a suitable technique of separation of a mixture of calcium sulphate and camphor.
  • Crystallisation
  • Sublimation
  • Distillation
  • None
Name the method used to separate a mixture of iodine and sodium chloride ?
  • Crystallisation
  • Fractional Crystallisation
  • Sublimation
  • Steam distillation
What conclusion can be drawn if red colour is obtained during Lassaigne test ?
  • Pressure of S
  • Pressure of N
  • both 1 and 2
  • 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 ?
  • Fractional distillation
  • Steam distillation
  • Distillation under reduced pressure
  • Simple distillation
An organic compound from its aqueous solution can be seprated by
  • Distillation
  • Solvent extraction
  • Fractional distillation
  • Steam distillation
Which of the following compound gives blood red colouration when its Lassaigne extract is treated with alkali and ferric chloride ?
  • Thiourea
  • Diphenyl Sulphide
  • Phenyl hydrazine
  • Benzomide
Which of the following compounds will give Lassaigne test for nitrogen ?
  • NH2NH2
  • NaNO3
  • NH4Cl
  • NaCN
Which of the folowing will give bloodred colour while doing Lassaigne test for nitrogen
  • urea
  • Benzene sulphonic acid
  • Hydrazine
  • p-aminobenzene sulphonic acid
Name the method used to determine the molecular weight of organic compound.
  • Silver salt method
  • Chloroplatinate salt method
  • Mass spectrometery
  • 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.
  • 46
  • 23
  • 122
  • 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.
  • 148
  • 192
  • 208
  • 234
Chromatography is used for the purification of
  • solids
  • liquids
  • gases
  • All of these
The presence of halogen in an organic compound is detected by
  • Iodo form test
  • Silver mirror test
  • Beilstein’s test
  • Millon’s test
Which of the following pairs has the same percentage of carbon ?
  • CH3COOH & C2H5OH
  • C6H12O6 & C12H22O11
  • HCOOCH3 & C12H22O11
  • CH3COOH & C6H12O6
How will you separate a solution of benzene and chloroform ?
  • Sublimation
  • Filtration
  • Distillation
  • Crystallisation
When 32.25 gm ethyl chloride dehydrogenated it gives 50% alkene. What is the mass of product ?
  • 7 gm
  • 14 gm
  • 21 gm
  • 28gm
How much sulphur is present in organic compound if on analysis 0.53 gm of this compound gives 1.158gm of BaSO4 ?
  • 10%
  • 20%
  • 30%
  • 40%
Which method can be used to separate a mixture of KCl and KClO3 ?
  • Crystallisation
  • Fractional Crystallisation
  • Sublimation
  • Distillation
Middle ton’s test is used to detect
  • N
  • P
  • X
  • S
An organic compound weighing 4.337 mg yielded 10.35 mg of CO2 and 3.42 mg of H2O on oxidation with CuO. Calculate the empirical formula of the compound.
  • C3H5
  • C3H5O
  • C4H6O
  • C10H16O3
An organic compound contains 69% C and 4.8% H, the remainder being oxygen. Calculate the masses of CO2 and H2O produced when 0.2 gm of this substance is completely combusted.
  • 0.506g & 0.864g
  • 0.0864g & 0.0506g
  • 0.506g & 0.0684g
  • 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.
  • 37.56%
  • 40.5%
  • 35.7%
  • 31.23%
In the estimation of sulphur by Carius method, 0.468 gm of organic compound gave 0.668 gm BaSO4 . Calculate % of S.
  • 19.6
  • 21.7
  • 17.9
  • 16.9
Statement (A) : Vapour density and density both are same
Reason (R) : Molecular weight is twice the density
  • If both A and R are true, and reason is the true explanation of the assertion.
  • If both A and R are true, but R is not the true explanation of the A.
  • If A is true but R is false.
  • If both A and R are false.
Statement (A) : Lassaigne’s test is shown by diazonium salts.
Reason (R) : Diazonium salts are volatile.
  • If both A and R are true, and reason is the true explanation of the assertion.
  • If both A and R are true, but R is not the true explanation of the A.
  • If A is true but R isfalse.
  • If both A and R are false.
Name of following compound according to IUPAC nomenclature is
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6036.png
  • 4–methoxy–2–nitrobenzaldehyde
  • 4–formyl–3–nitroanisole
  • 4–methoxy–6–nitrobenzaldehyde
  • 2–formyl–5–methylnitrobenzene
The IUPAC name of the compound is :
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6038.png
  • 5-formylhex-2-en-3-one
  • 5-methyl-4-oxohex-2-en-5-al
  • 3-keto-2-methylhex-5-enal
  • 3-keto-2-methylhex-4-enal
IUPAC name of
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6040.png
  • 2–ethyl butene
  • 2–ethyl but–2–ene
  • 3–methyl pent–2–ene
  • None of these
The IUPAC name of CH3CHOHCH2CH(CH3 )CHO is
  • 2–hydroxy–4–methyl–pentanal
  • 4–hydroxy–2–methyl–pentanal
  • 2–hydroxy–2–methyl–pentanal
  • 2–methyl–pent–4–ol–l–al

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6043.png
  • but–3–enoic acid
  • but–l–enoic acid
  • pent–4–enoic acid
  • prop–2–enoic acid

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6045.png
  • 2-ethylprop-2- en-1 -ol
  • 2-hydroxymethylbutan-l-ol
  • 2-methylenebutan-l-ol
  • 2-ethyl-3 -hydroxyprop-1 -en
The IUPAC name of the following compound, is
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6047.png
  • 4-bromo-3-cyanophenol
  • 2-bromo-5-hydroxybenzonitrile
  • 2-cyano-4-hydroxybromobenzene
  • 6-bromo-3-hydroxybenzonitrile
IUPAC name of (CH3)3 CCl is
  • n-butylchloride
  • 3-chlorobutane
  • 2-chloro- 2-methyl propane
  • t-butyl chloride
The correct IUPAC name of the following acid is
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6050.png
  • Z-3-ethyl-4-methylhex-3-en-1-oic acid
  • Z-3-ethyl-4-methylhexanoic acid
  • Z-3,4-diethylpent-3-en-l-oic acid
  • E-3-ethyl-4-methylhex-4-en-l-oic acid
  • 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.
  • I, II
  • II, III
  • IV, V
  • II, V
  • III, V
The correct name for the following hydrocarbon is
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6053.png
  • tricyclo (4.1.heptane
  • bicyclo (5.2.heptane
  • bicyclo (4.1.heptane
  • bicyclo (4.1.hexane
Write the IUPAC name of
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6055.png
  • 3–methoxybutane
  • 2–methoxybutane
  • 3–methyl–3–methoxypropane
  • butoxy methane
The IUPAC name of
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6057.png
  • ethoxy propane
  • 1, 1–dimethyl ether
  • 2–ethoxy–iso–propane
  • 2–ethoxy propane
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6059.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6060.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6061.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6062.png
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