To transform an alcohol attached to a carbon chain into an alkyne, the process typically involves several key steps. Initially, the alcohol can be dehydrated using concentrated sulfuric acid and heat to form an alkene, although the suitability of this method depends on the sensitivity of other functional groups present in the molecule. Following alkene formation, elemental bromine (Br2) can be added to create a dibromo compound. The final step involves a double dehydrohalogenation using an eliminating agent such as NaOH in glycerol or KOH in ethanol, which leads to the formation of a triple bond, resulting in the desired alkyne. Additional details about the specific carbon chain structure may be needed for more tailored advice.