JEE Questions for Chemistry Hydrocarbons Quiz 7 - MCQExams.com

Acetylene and HCHO react in presence of copper acetylide catalyst to form
  • 1-butyne-1, 4-diol
  • 2-butyne-1, 2-diol
  • 2-butyne-1, 4-diol
  • None of these

Chemistry-Hydrocarbons-4761.png
  • A is cis and B is trans
  • A is trans and B is cis
  • A and B are cis
  • A and B are trans
Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is

  • Chemistry-Hydrocarbons-4762.png
  • 2)
    Chemistry-Hydrocarbons-4763.png

  • Chemistry-Hydrocarbons-4764.png

  • Chemistry-Hydrocarbons-4765.png
Which of the following reactions will yield, 2,2-dibromopropane ?
  • CH3 —C = CH+ 2HBr →
  • CH3 CH =CHBr + HBr →
  • CH ≡CH + 2HBr →
  • CH3 — CH =CH2 + HBr →

Chemistry-Hydrocarbons-4766.png
  • HNO3
  • O2
  • O3
  • KMnO4

Chemistry-Hydrocarbons-4767.png
  • NH4 OH / 80° C
  • Conc. H2SO4 / 160° C
  • Anhydrous ZnCl2/ 150° C
  • Dilute HCl/THF, 80°C
  • CH3OK / 160 - 200° C

Chemistry-Hydrocarbons-4768.png

  • Chemistry-Hydrocarbons-4769.png
  • 2)
    Chemistry-Hydrocarbons-4770.png

  • Chemistry-Hydrocarbons-4771.png

  • Chemistry-Hydrocarbons-4772.png
Identify B in the following reaction,
Chemistry-Hydrocarbons-4773.png
  • CH4
  • C2H6
  • C2H5Cl
  • C2H5OH

Chemistry-Hydrocarbons-4774.png

  • Chemistry-Hydrocarbons-4775.png
  • 2)
    Chemistry-Hydrocarbons-4776.png

  • Chemistry-Hydrocarbons-4777.png

  • Chemistry-Hydrocarbons-4778.png
HBr reacts with CH2 = CH —OCH3 under anhydrous conditions at room temperature to give
  • CH3 CHO and CH3 Br
  • BrCH2 CHO and CH3OH
  • BrCH2— CH2 — OCH3
  • H3C — CHBr — OCH3
The Markownikoff s rule is the best applicable to the reaction between
  • C2 H4 + HC1
  • C3 H6 + Br2
  • C3H6 + HBr
  • C3 H8 + Cl2
  • C2H4 + I2
An alkene on reductive ozonolysis gives 2-molecules of CH2 (CHO)2. The alkene is
  • 2,4-hexadiene
  • 1,3-cyclohexadiene
  • 1,4-cyclohexadiene
  • 1-methyl-1, 3-cyclopentadiene
  • 1,2-dimethyl cyclopropene
In the following reaction, A and B, respectively are
Chemistry-Hydrocarbons-4780.png
  • C2 H4 , alc. KOH /∆
  • C2H5Cl, aq. KOH /∆
  • CH3 OH, aq. KOH / ∆
  • C2H2 , PBr3
The major product in the reaction of 2-butyne with Li/liq. NH3 is

  • Chemistry-Hydrocarbons-4781.png
  • 2)
    Chemistry-Hydrocarbons-4782.png
  • CH3 CH2 CH2 CH3
  • H2 C = CH—CH2—CH3
In the reaction sequence,
Chemistry-Hydrocarbons-4783.png
  • CH3 COCH3
  • CH3 COCH2 OH
  • CH3 COOH + HCOOH
  • CH3 CHO + HCHO
2-methylbutane on reacting with bromine in the presence of sunlight gives mainly
  • 1-bromo-3-methylbutane
  • 2-bromo-3-methylbutane
  • 2-bromo-2-methylbutane
  • 1-bromo-2-methylbutane
Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 40°C gives predominantly
  • 1-bromo-2-butene under kinetically controlled conditions
  • 3-bromobutene under thermodynamically controlled conditions
  • 1-bromo-2-butene under thermodynamically controlled conditions
  • 3-bromobutene under kinetically controlled conditions
Following compound is treated with NBS
Chemistry-Hydrocarbons-4784.png

  • Chemistry-Hydrocarbons-4785.png
  • 2)
    Chemistry-Hydrocarbons-4786.png

  • Chemistry-Hydrocarbons-4787.png

  • Chemistry-Hydrocarbons-4788.png
The conversion of propene to propanol is .... type of reaction.
  • hydrogenation
  • hydration
  • hydrolysis
  • dehydrogenation
A gas decolourised by KMnO4 solution but gives no precipitate with ammoniacal cuprous chloride is
  • ethane
  • methane
  • ethene
  • acetylene
An alkene having molecular formula C9H18 on ozonolysis gives 2,2-dirnethyl propanal and 2-butanone. The alkene is
  • 2, 2, 2-trimethyl-3-hexene
  • 2, 2, 6-trimethyl-3-hexane
  • 2, 3, 4-trimethyl-2-hexene
  • 2, 2, 4-trimethyl-3-hexene
  • 2, 2-dimethy1-1, 3-heptene
In the sequence of reactions,
Chemistry-Hydrocarbons-4790.png
  • N-methyl ethanamine
  • N-propylamine
  • N, N-dimethylamine
  • ethyl cyanide
A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline KMnO4. The gas is
  • C2H6
  • CH4
  • C2H2
  • C2H4

Chemistry-Hydrocarbons-4791.png
  • cis, trans-2-butene
  • both trans-2-butene
  • trans, cis-2-butene
  • both cis-2-butene
An organic alkadiene on reductive ozonolysis produces
I. acetaldehyde
II. acetone
III. 2-methylpropane-1,3-dial
The formula of alkadiene will be

  • Chemistry-Hydrocarbons-4792.png
  • 2)
    Chemistry-Hydrocarbons-4793.png

  • Chemistry-Hydrocarbons-4794.png

  • Chemistry-Hydrocarbons-4795.png
Cetane number of a diesel fuel will increase with the addition of
  • n–Decane
  • n–Hexadecane
  • n–Pentane
  • α–Methylnaphthalene
A mixture of ethyl iodide and n–propyl iodide is subjected to Wurtz reaction. The hydrocarbon which will not be formed is
  • Butane
  • Propane
  • Pentane
  • Hexane
To prepare a pure sample of n – hexane using sodium metal as one reactant, the other reactants will be
  • Ethyl chloride and n – butyl chloride
  • Methyl bromide and n-pentyl bromide
  • n – Propyl bromide
  • Ethyl bromide and n – butyl bromide
Petrol used as a fuel in automobiles is mixture of
  • Hydrocarbons
  • Alcohols
  • Carbohydrates
  • Hydrocarbons and alcohols.
n–Propyl bromide on treatment with ethanolic potassium hydroxide produces
  • Propanol – 1
  • Propene
  • Propanol – 2
  • Ethyl propyl ether.
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