JEE Questions for Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 8 - MCQExams.com

The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralisation. The organic compound is
  • acetamide
  • benzamide
  • urea
  • thiourea
Quantitative measurement of nitrogen in an organic compound is done by the method
  • Berthelot method
  • Beilstein's method
  • Lassaigne's test
  • Kjeldahl's method
Under identical conditions, the SN 1 reaction will occur most efficiently with
  • tert-butyl chloride
  • 1-chlorobutane
  • 2-methyl-1-chloropropane
  • 2-chlorobutane
The total number of possible alkenes by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is
  • 1
  • 3
  • 5
  • 7
In electrophilic aromatic substitution reaction, the nitro roup is meta-directing because it
  • decreases electron density at ortho and para-positions
  • decreases electron density at meta-position
  • increases electron density at meta-position
  • increases electron density at ortho andpara-positions
The electrophile involved in the sulphonation of benzene is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6146.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6147.png
  • H3 O+
  • SO3
The reaction of sodium ethoxide with iodoethane to form diethyl ether is termed as
  • electrophilic substitution
  • nucleophilic substitution
  • electrophilic addition
  • radical substitution
Arrange the following compounds in order of their decreasing reactivity towards an electrophile,E⊕
I. Chlorobenzene
II. 2, 4-dinitrochlorobenzene
III. p-nitrochlorobenzene
  • III > II > I
  • II > III > I
  • I > III > II
  • I > II > III
The least active electrophile is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6150.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6151.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6152.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6153.png
During nitration of benzene, the attacking electrophile is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6155.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6156.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6157.png
  • HNO3
Grignard reagent adds to
  • C = O
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6159.png
  • C = S
  • All of these

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6161.png
  • 1 - (2 - Butyl)cyclohexane
  • 1 - (3 - Butyl)cyclohexane
  • 2 - Cyclohexylbutane
  • 3 - Cyclohexylbutane
2-Methyl-2-butene will be represented as

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6163.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6164.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6165.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6166.png
The structural formula of cyclohexyl alcohol is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6168.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6169.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6170.png
  • None of these
The IUPAC name of (CH3)3 C - CH = CH2 is
  • 2,2-Dimethylbut-3-ene
  • 2,2-Dimethylpent-4-ene
  • 3,3-Dimethylbut-1-ene
  • Hex-1-ene

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6172.png
  • 2-Methyl-2-butenoic acid
  • 3-Methyl-3-butenoic acid
  • 3-Methyl-2-butenoic acid
  • 2-Methyl-3-butenoic acid

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6174.png
  • 6-Chloro-4-ethyl-5-methylhept-5-en-1-yne
  • 6-Chloro-4-ethyl-5-methylhept-1-yn-5-ene
  • 2-Chloro-4-ethyl-3-methylhept-2-en-6-yne
  • 2-Chloro-4-ethyl-3-methylhept-6-yn-2-ene
Vinylcarbinol is
  • HO — CH2 — CH = CH2
  • CH3CH(OH) = CH2
  • CH3 — CH = CH — OH
  • CH3— C(CH2OH) = CH2

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6176.png
  • 3-Methylcycohexane
  • 1-Methylcyclohex-2-ene
  • 6-Methylcyclohexane
  • 1-Methylcyclohex-5-ene

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6178.png
  • 1,1-Dibutyl-2,3-dimethylbutane
  • 2,4,4-Dibutyl-3,3-dimethylbutane
  • 5-(1,2-Dimethylpropyl)nonane
  • 4-Butyl-2,3-dimethyloctane
Which of the following compounds is not correctly named?

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6180.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6181.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6182.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6183.png

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6185.png
  • 1-Bromo-2-chloro-6-fluoro-4-iodobenzene
  • 1-Bromo-6-chloro-2-fluoro-4-iodobenzene
  • 2-Bromo-1-chloro-3-fluoro-5-iodobenzene
  • 2-Bromo-3-chloro-1-fluoro-5-iodobenzene

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6187.png
  • 6-Oxo-1,2,2-trimethylbicyclo [2.2.1] heptane
  • 1,7,7-Trimethylbicyclo[2.2.1] heptan-2-one
  • 1,5,5-Trimethylbicyclo[2.1.1] hexan-2one
  • 1,7,7-Trimethylbicyclo [2.1.2] heptan-2-one

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6189.png
  • Bicyclo[2.2.2] oct-2-en-5-nitrile
  • Bicyclo[2.2.2]oct-5-en-2-carbonitrile
  • 3-Cyanobicyclo[2.2.2]oct-5-ene
  • 2-Cyanobicyclo[2.2.2]oct-5-ene

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6191.png
  • 2-Methylspiro[5.4]deca-1, 6-diene
  • 2-Methylspiro[4.5]deca-1, 6-diene
  • 8-Methylspiro[4.5]deca-1, 7-diene
  • 3-Methylspiro[5,4]deca-3, 7-diene

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6193.png
  • 3-(4-Hydroxyiminocyclohexyl)propanoic acid
  • 3-(4-Hydroxyaminocyclohexyl) propanoic acid
  • 3-(4-Hydroxyaminobenzyl)propanoic acid
  • 3-(4-Hydroxyiminophenyl)propanoic acid
Which of the following contains three pairs of electrons in the valence shell ?
  • Carbocations
  • Carbanions
  • Free radicals
  • None

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6195.png
  • sp2 and sp2
  • sp3 and sp
  • sp and sp2
  • sp and sp
The formation of cyanohydrin from a ketone is an example of
  • Electrophilic addition
  • Nucleophilic addition
  • Nucleophilic substitution
  • Electrophilic substitution
Which of the following possesses a sp-carbon in its structure?
  • CH2 = CCl – CH = CH2
  • CCl2 = CCl2
  • CH2 = C = CH2
  • CH2 = CH – CH = CH2
The enolic form of acetone contains
  • Nine σ − bonds, one bond π − bonds and two lone pairs
  • Eight σ − bonds,two bonds π − bonds and two lone pairs
  • Nine σ − bonds,one π − bond andlone pair
  • Nine σ – bonds, two π – bonds and one lone pair
The hybridization of carbon atoms in C-C single bond of HC ≡ C — C H = CH2 is
  • sp3 - sp3
  • sp2 - sp3
  • sp - sp2
  • sp3 - sp
A straight chain hydrocarbon has the molecular formula C8H10. The hybridization of the carbon atoms from one end of the chain to the other are respectively sp3, sp2, sp2, sp3, sp2, sp2 and sp.
The structural formula of the hydrocarbon would be :
  • CH3C ≡ CCH2 — CH = CHCH = CH2
  • CH3CH2 — CH = CHCH = CHC ≡ CH
  • CH3CH = CHCH2 — C ≡ CCH = CH2
  • CH3CH = CHCH2 — CH = CHC ≡ CH
Homolytic fission of C—C bond in ethane gives an intermediate in which carbon is
  • sp3 - hybridised
  • sp2 - hybridised
  • sp - hybridised
  • sp2d - hybridised
Which is the correct symbol relating the two Kekule structures of benzene?

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6201.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6202.png
  • ≡

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6203.png
When the hybridization state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridized orbitals
  • decreases gradually
  • decreases considerably
  • is not affected
  • increases progressively
The kind of delocalization involving sigma bond orbitals is called
  • Inductive effect
  • Hyperconjugation effect
  • Electromeric effect
  • Mesomeric effect

Chemistry-Organic Chemistry Some Basic Principles and Techniques-6204.png
  • (i) and (v)
  • (ii) and (iii)
  • (ii), (iii) and (iv
  • (iv)
Which of the following will show aromatic behaviour ?

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6205.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6206.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6207.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6208.png
The bond length between sp3 - hybridized carbon and other carbon atom is minimum in
  • Propane
  • Propyne
  • Propene
  • Butane
The order of decreasing stability of the carbanions (CH3) – (I); (CH3)2CH – (II); CH CH – (III); CH CH – (IV) is
  • I > II > III > IV
  • IV > III > II > I
  • IV > I > II > III
  • I > II > IV > III
The reaction, CH2 = CH - CH3 + HBr → CH3 CHBr - CH3 is
  • Nucleophilic addition
  • Electrophilic substitution
  • Electrophilic addition
  • Free radical addition
Which of the following is correct regarding the – I -effect of the substitutents?
  • – NR2 < – OR < – F
  • – NR2 > – OR < – F
  • – NR2 < – OR > – F
  • – NR2 – OR > – F
The most unlikely representation of resonance structures of p-nitrophenoxide ion is

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6212.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6213.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6214.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6215.png
Bond length of ethane
(I), ethene
(II), acetylene
(III) and benzene
(IV) follows the order :
  • I > IV >II > III
  • I > II > IV > III
  • I > II > III > IV
  • III > IV > II > I
The structural formula of a compound is CH3 – CH = C = CH2. The types of hybridization at the four carbons from left to right are
  • sp2, sp2, sp2, sp3
  • sp2, sp3, sp2, sp2
  • sp3, sp2, sp, sp2
  • sp3, sp2, sp2, sp2
Which among the following is aromatic ?
Chemistry-Organic Chemistry Some Basic Principles and Techniques-6217.png
  • I
  • II
  • III
  • IV
  • V
The compound which contains all the four 10, 20, 30 and 40 carbon atoms is
  • 2,3-Dimethylpentane
  • 3-Chloro-2, 3- dimethylpentane
  • 2,3,4- Trimethylpentane
  • 3, 3- Dimethylpentane
Which of the following alkenes will react fastest with H2 under catalytic hydrogenation conditions?

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6219.png
  • 2)
    Chemistry-Organic Chemistry Some Basic Principles and Techniques-6220.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6221.png

  • Chemistry-Organic Chemistry Some Basic Principles and Techniques-6222.png
Which of the following has the highest nucleophilicity?
  • F–
  • OH–
  • CH–3
  • NH–2
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