The general formula of alkynes is-

This question was previously asked in
RRB JE CBT I - (Held On: 30 May 2019 Shift 2)
View all RRB JE Papers >
  1. CnH2n-2
  2. CnH2n+4
  3. CnH2n+2
  4. CnH2n

Answer (Detailed Solution Below)

Option 1 : CnH2n-2
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF
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.
Latest RRB JE Updates

Last updated on Jun 7, 2025

-> RRB JE CBT 2 answer key 2025 for June 4 exam has been released at the official website.

-> Check Your Marks via RRB JE CBT 2 Rank Calculator 2025

-> RRB JE CBT 2 admit card 2025 has been released. 

-> RRB JE CBT 2 city intimation slip 2025 for June 4 exam has been released at the official website.

-> RRB JE CBT 2 Cancelled Shift Exam 2025 will be conducted on June 4, 2025 in offline mode. 

-> RRB JE CBT 2 Exam Analysis 2025 is Out, Candidates analysis their exam according to Shift 1 and 2 Questions and Answers.

-> The RRB JE Notification 2024 was released for 7951 vacancies for various posts of Junior Engineer, Depot Material Superintendent, Chemical & Metallurgical Assistant, Chemical Supervisor (Research) and Metallurgical Supervisor (Research). 

-> The selection process includes CBT 1, CBT 2, and Document Verification & Medical Test.

-> The candidates who will be selected will get an approximate salary range between Rs. 13,500 to Rs. 38,425.

-> Attempt RRB JE Free Current Affairs Mock Test here

-> Enhance your preparation with the RRB JE Previous Year Papers

Get Free Access Now
Hot Links: yono teen patti teen patti real money app teen patti game teen patti live teen patti master downloadable content