Chemistry - Hydrocarbons

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Question - 1

By Wurtz reaction, a mixture of methyl iodide and ethyl iodide gives

  • A Butane
  • B Ethane
  • C Propane
  • D A mixture of the above three

Question - 2

Formation of alkane by the action of zinc on alkyl halide is called

  • A Wurtz reaction 
  • B Kolbe's reaction
  • C Ulmann's reaction
  • D Frankland reaction

Question - 3

Which isomer of hexane has only two different sets of structurally equivalent hydrogen atoms?

  • A 2,2-dimethylbutane
  • B 2-methylpentane
  • C 3-methylpentane
  • D 2, 3-dimethylbutane

Question - 4

The increasing order of reduction of alkyl halides with zinc and dilute HCl is

  • A \(R-CL
  • B \(R-CL
  • C \(R-I
  • D \(R-Br

Question - 5

Ozonolysis of an organic compounds givves formaldehyde as one of the products. This confirms the presence of

  • A two ethylenic double bonds
  • B a vinyl group
  • C an iso-propyl group
  • D an acetylenic triple bond

Question - 6

A gas which reacts with aqueous \(KMnO_{4}\)solution but does not give precipitates with ammoniacal \(Cu_{2}Cl_{2}\) solution is

  • A ethylene
  • B methane
  • C acetylene
  • D ethane

Question - 7

Addition of HI on double bond of propene yields isopropyl iodide as major product. It is because the addition proceeds through

  • A More stable carbocation
  • B More stable carboanion
  • C homolysis
  • D more stable free radical

Question - 8

Which does not follow Markownikoff"s rule?

  • A \(CH_{3}-CH=CH_{2}\)
  • B \(CF_{3}CH=CH_{2}\)
  • C \(CH_{3}-\underset{\underset{CH_3}{|}}{CH}-CH=CH_{2}\)
  • D \(CH_{3}-CH_{2}-CH=CH_{2}\)

Question - 9

Arrange the following hydrogen halides in the order of their decreasing reactivity with propene

  • A HCL>HBr>HI
  • B HBr>HI>HCl
  • C HI>HBr>HCl
  • D HCl>HI>HBr

Question - 10

Acid catalysed hydration of alkenes except ethene leads to the formation of

  • A primary alchol
  • B secondary or tertiary alchol
  • C mixture of primary and secondary alcohols
  • D mixture of secondary and tertiary alcohols