Multiple choice general knowledge science & technology

What is the molecular formula for alkynes

  1. CnH2n

  2. CnH2n+2

  3. CnHn

  4. CnH2n-2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The general molecular formula for alkynes is CnH2n-2, where n is the number of carbon atoms. This is because alkynes contain a triple bond, which reduces the hydrogen count by 4 compared to alkanes (CnH2n+2). Option A (CnH2n) is the formula for cycloalkanes or alkenes. Option B (CnH2n+2) is for alkanes. Option C (CnHn) is not a standard hydrocarbon formula.

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