C4H8 molecule has two reactive double bonds for addition

Steps:

• Determine the structure from the shown molecule: C4H8 with two C=C bonds (e.g., non-standard diene isomer or context-specific).
• For bromine addition: each double bond adds one Br2 molecule via electrophilic addition, so one C4H8 reacts with two Br2.
• For steam reaction: acid-catalyzed hydration adds H2O across one double bond, forming an alcohol.
• Confirm products: no carboxylic acid from simple addition; requires oxidation.

Why C is correct:

• Dienes undergo stepwise addition of two Br2 molecules (one per double bond) and hydration yields alcohol per the reaction mechanism.

Why the others are wrong:

• A: Only one Br2 adds, as it assumes a monoalkene.
• B: Hydration of alkene/diene gives alcohol, not carboxylic acid (which needs further oxidation).
• D: Steam forms alcohol, not carboxylic acid.

Final answer: C