Question

Alkynes occur in nature in:

• A. free state
• B. partially free state
• C. combined state
• D. none of these

Answer 1

The correct option is C combined state

Alkynes are unsaturated compound, therefore, not found in the free state in nature. Small amounts of alkynes are found in crude oil and natural gas. However, alkynes found in nature in plants and in some animals possess physiological functions as an example, ichthyotherol is the active component in poisoned arrowheads used by Amazon Indians. Isolated from the secretions of the skin glands of a poison dart frog, it causes convulsions in mammals.