JEE Questions for Chemistry Hydrocarbons Quiz 13 - MCQExams.com

A : Pyrrole is an aromatic heterocyclic compound
R : It has a cyclic, delocalised 6πelectrons
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : CH4 does not react with Cl2 in dark
R : Chlorination of CH4 takes place in Sunlight
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : Neopentane forms only one monosubstitated Compound
R : Neopentane has high bond energy
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If A is false but R is ture
A : Styrene on reaction with HBr gives 2-bromo-2-phenylethane
R :Benzyl radical is more stable than alkyl radicals
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : Butane-1-ol on dehydration Conc.H2SO4 gives mainly But-1-en
R :Dehydration occurs through Carbocation intermediate
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A :Melting point of neopentane is higher than that of iso-pentane
R : Neopentane Contains a quaternary carbon
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : Acetylene react with NaNH2 to give Sodium acetylide and ammonia
R : SP-hybridized carbon of acetylene are considerably electronegative
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : Addition of H2O to acetylene occurs in presence of dil. H2SO4 and HgSO4 to give acetaldehyde
R : It is an example of electrophilic addition reaction
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture
A : Addition of HI to vinyl chloride produces 1-chloro1-iodoethane
R :HI adds to vinyl chloride againt markownikov`s Rule
  • If both A and R are true and R is the Correct explanation of A
  • If both A and R are true but R is not the Correct explanation of A
  • If A is true but R is false
  • If both A and R are false
  • If A is false but R is ture

Chemistry-Hydrocarbons-5025.png
  • A = s, B = r, c = q, D = p
  • A = r, B = s, c = p, D = q
  • A = s, B = q, c = r, D = p
  • A = r, B = p, c = q, D = s
Paragraph :- Cyclohexene on ozonolysis following by reaction with Zinc dust and water gives aldehyde(P). Compound (p) on further treatment with aqueous KOH yields compound(Q).
The structure of compound (Q) is

  • Chemistry-Hydrocarbons-5026.png
  • 2)
    Chemistry-Hydrocarbons-5027.png

  • Chemistry-Hydrocarbons-5028.png

  • Chemistry-Hydrocarbons-5029.png
In an industrial process, coke is hetaed with quick-lime in an electric furnace and the cooled product is then treated with water to produce
  • Acetylene
  • Ethylene
  • Ethane
  • Methane
(CH3)3CMgCl on reaction with D2O produces
  • (CH3)3 CD
  • (CH3)3 COD
  • (CD)3 CD
  • (CD)3COD
Which one of the following heptanols can be dehydrated to hept–3–ene only ?
  • Heptan–3–ol
  • Heptan–4–ol
  • Heptan–2–ol
  • Heptan–1–ol
When CH3CH2CHCl2 is treated with NaNH2, the product formed is

  • Chemistry-Hydrocarbons-5035.png
  • 2)
    Chemistry-Hydrocarbons-5036.png

  • Chemistry-Hydrocarbons-5037.png

  • Chemistry-Hydrocarbons-5038.png
A sample of diesel has the same knocking characteristics as a 60 ml mixture of cetane and α − methy lnaphthalene mixed in 2:1 ratio. The cetane number of the diesel sample is
  • 60
  • 40
  • 66.6
  • 33.3
Arrange the following in increasing order of their release of energy on combustion
Chemistry-Hydrocarbons-5040.png
  • III < IV < I < II
  • I < II < IV < III
  • III < IV < II < I
  • I >II > III > IV
Which of the following reactions is used to prepare isobutane?
  • Wurtz reaction of C2H5Br
  • Hydrolysis of n – butylmagnesium iodide
  • Reduction of propanol with red phosphorus and HI
  • Decarboxylation of 3 – methylbutanoic acid.
The reaction of sodium formate with soda-lime gives
  • Methane
  • Hydrogen
  • Ethane
  • None of these
The best reagent to convert 1, 2-dichloropropane to propyne is
  • Zinc dust
  • NaNH2 in liq. NH3
  • Alc.KOH
  • Alc. NaNH2
Dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly gives
  • 2 – Methyl –1– butene
  • 2 – Methyl – 2 – butene
  • 2,2 – Dimethyl –1– butene
  • 2 – Butene
Which of the following reactions gives H2C = C = C = CH2

  • Chemistry-Hydrocarbons-5045.png
  • 2)
    Chemistry-Hydrocarbons-5046.png

  • Chemistry-Hydrocarbons-5047.png

  • Chemistry-Hydrocarbons-5048.png
Formation of alkane by the action of Zn on alkyl halide is called ?
  • Frankland`s reaction
  • Wurtz reaction
  • Cannizzaro reactions
  • Kolbe`s reactions

Chemistry-Hydrocarbons-5050.png
  • CH3 CH2 OH
  • CH3 CHO
  • CH3 - CH3
  • CH2 = CH2
1,3-butadiene (Buta-1,3-diene) reacts with ethylene to form
  • Benzene
  • Cyclohexane
  • Cyclohexene
  • 2,3-dimethyl butane
Ethylene dibromide on heating with alc.KOH gives mainly.
  • Ethane
  • Ethylene
  • Acetylene
  • Ethyl bromide
In presence of nickel cyanide, acetylene gives
  • Benzene
  • Cyclohexane
  • Cyclo octa tetraene
  • Cyclohexatriene
Addition of HCN to Acetylene in presence of Ba(CN)2 gives
  • Cyanoethane
  • propanenitrile
  • Acrylonitrile
  • Ethyl Cyanides

Chemistry-Hydrocarbons-5056.png

  • Chemistry-Hydrocarbons-5057.png
  • CH3CHO + CH3CHO
  • CH3 CH2C ≡ CH
  • CH3COOH + CH3COOH

Chemistry-Hydrocarbons-5059.png
  • cis and trans but-2-ene
  • trans and cis but-2-ene
  • Both cis but-2-ene
  • Both trans but-2-ene
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