The general formula of an alkyl halide (where X represents the halide) is?

JAMB Chemistry 2024 206 views
Source: JAMB · 2024

The general formula of an alkyl halide (where X represents the halide) is?

  1. CₙH₂ₙ₋₂X
  2. CₙH₂ₙ₊₁X ✓
  3. CₙH₂ₙ₊₂X
  4. CₙH₂ₙX
Explanation

An alkyl halide is an alkane in which one hydrogen atom has been replaced by a halogen X.

The alkane formula is CₙH₂ₙ₊₂. Remove one H and add X:

CₙH₂ₙ₊₁X

Example: ethane C₂H₆ becomes chloroethane C₂H₅Cl, which is C₂H₂(₂)₊₁Cl with n = 2.

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