The general formula of alkynes is-

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RRB JE CBT I - (Held On: 30 May 2019 Shift 2)
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  1. CnH2n-2
  2. CnH2n+4
  3. CnH2n+2
  4. CnH2n

Answer (Detailed Solution Below)

Option 1 : CnH2n-2
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Detailed Solution

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The correct answer is option 1

Key Points

  • Option 1 is correct because the general formula for alkynes is CnH2n-2.
  • Alkynes are hydrocarbons that contain at least one carbon-carbon triple bond.
  • This general formula applies to alkynes with a single triple bond and no other functional groups or rings.
  • Examples of alkynes include ethyne (C2H2) and propyne (C3H4).

Additional Information

  • The general formula for alkanes is CnH2n+2, and for alkenes, it is CnH2n.
  • Alkynes exhibit characteristic reactions such as addition reactions due to the presence of the triple bond.
  • They are also known as acetylenes, named after the simplest alkyne, ethyne (acetylene).
  • Alkynes are used in various industrial applications, including welding and as precursors to synthesize other chemicals.

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