JEE Questions for Chemistry Hydrocarbons Quiz 3 - MCQExams.com

Reaction of HBr with propene in the presence of peroxide gives
  • iso-propyl bromide
  • 3-bromo propane
  • allyl bromide
  • n-propyl bromide
The test for unsaturation is confirmed by the decolourisation of which of the following ?
  • Iodine water
  • CuSO4 solution
  • Bromine water
  • All of the above
When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is
  • methanoic acid
  • ethanal
  • methanol
  • methanal
Ethylene reacts with 1% alkaline KMnO4 to form
  • oxalic acid
  • ethylene glycol
  • ethyl alcohol
  • HCHO

Chemistry-Hydrocarbons-4611.png
  • meso diol
  • racemic diol
  • Both (a) and (b)
  • None of the above
Which of these does not follow anti-Markownikoff's rule?
  • 2-butene
  • 1-butene
  • 2-pentene
  • 2-hexene
Which reacts with ammoniacal AgNO3 ?
  • Propyne
  • 2-butyne
  • 1, 3-butadiene
  • Pentene
Which is most acidic of the following ?
  • Methane
  • Acetylene
  • 1-butene
  • Neo-pentane
Acetylene does not react with
  • Na
  • ammoniacal AgNO3
  • HCl
  • NaOH
Propyne and propene can be distinguished by
  • conc. H2SO4
  • Br2 in CCl4
  • alk. KMnO4
  • AgNO3 in NH3
When 2-butyne is treated with Pd-BaSO4, the product formed will be
  • cis-2-butene
  • trans-2-butene
  • 1-butene
  • 2-hydroxy butane
The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne.
The bromoalkane and alkyne respectively are
  • BrCH2 CH2 CH2 CH2 CH3 and CH3 CH2 C ≡ CH
  • BrCH2 CH2 CH3 and CH3 CH2CH2 C ≡ CH
  • BrCH2 CH2 CH2 CH2 CH3 and CH3 C ≡ CH
  • BrCH2 CH2 CH2 CH3 and CH3 CH2 C ≡ CH
Decarboxylation of sodium propionate leads to the formation of
  • methane
  • ethene
  • propanone
  • ethane
A Wittig reaction with an aldehyde gives
  • ketone compound
  • a long chain fatty acid
  • olefin compound
  • epoxide
The products formed in reaction is (are)
Chemistry-Hydrocarbons-4616.png
  • ethane
  • propane
  • butane
  • ethane, propane and butane
What is Z in the following reaction?
Chemistry-Hydrocarbons-4618.png
  • propane
  • n-butane
  • ethane
  • ethyne
A mixture of 1-chlorobutane and 2-chlorobutane when treated with alcoholic KOH gives
  • 1-butene
  • 2-butene
  • iso-butylene
  • mixture of 1-butene + 2-butene

Chemistry-Hydrocarbons-4620.png
  • hydrogen and methane
  • hydrogen and ethylene
  • ethylene and methane
  • None of these
(CH3)3 CMgCl on reaction with D2O produces
  • (CH3)3 COD
  • (CD3)3 CH
  • (CH3)3 CD
  • (CD3)3 CD
  • (CD3)3 COD
2-chloro-3-methylbutane is treated with sodium in ethereal solution, then it will give
  • 2,4-dimethylhexane
  • 3,5-dimethylhexane
  • 2,3,4,5-tetramethylhexane
  • 2,6-dimethyloctane
The major product formed when a 3,3-dimethyl butan-2-ol is heated with concentrated sulphuric acid, is
  • 2,3-dimethyl-2-butene
  • 2,3-dimethyl-1-butene
  • 3,3-dimethyl-l-butene
  • cis and trans isomers of 2,3-dimethyl-1-butene
An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide ?
  • Methyl iodide
  • Ethyl iodide
  • Ethyl bromide
  • Propyl bromide
Wet ether is not used as a solvent in Wurtz reaction, because the water present in it
  • hydrolysis RX to ROH
  • reduces RX to RH
  • destroy the Na metal
  • reacts with R—R
The reagent(s) for the following conversion, is/are
Chemistry-Hydrocarbons-4627.png
  • alcoholic KOH
  • alcoholic KOH followed by NaNH2
  • aqueous KOH followed by NaNH2
  • Zn / CH3 OH
By which one of the following compounds both CH4 and CH3 —CH3 can be prepared in one step?
  • CH3 I
  • CH3 OH
  • CH3 CH2 I
  • C2 H5 OH
Aqueous solution of an organic compound, A on electrolysis liberates acetylene and CO2 at anode. A is
  • potassium acetate
  • potassium succinate
  • potassium citrate
  • potassium maleate

Chemistry-Hydrocarbons-4631.png
  • C2 H4
  • C2 H2
  • C2 H6
  • Ca(OH)2
Which of the following reagents when heated with ethyl chloride, forms ethylene ?
  • Aqueous KOH
  • Zn/HCl
  • Alcoholic KOH
  • HI
The reaction conditions used for converting 1,2-dibromopropane to propylene are
  • KOH, alcohol/∆
  • KOH, water/∆
  • Zn, alcohol/∆
  • Na, alcohol/∆
By Wurtz reaction, a mixture of methyl iodide and ethyl iodide gives
  • butane
  • ethane
  • propane
  • a mixture of the above three
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