Question Detail

Unsaturated hydrocarbons are nonpolar and insoluble in water, but soluble in nonpolar solvents. They are generally less dense than water (float on water), not more dense. Therefore, statements (a) is correct and (b) is incorrect, so (d) cannot be correct. The correct option based on the given answer key is (d), which includes (a) and (c), but this is inconsistent with general chemistry knowledge.