Question

Maleic acid and Fumaric acid are

• A. Position Isomers
• B. Geometric Isomers
• C. Enantiomers
• D. Functional Isomers

Hint:

Maleic (cis) and fumaric (trans) acids are classic examples of geometrical isomerism.

Answer 1

The Correct Option is B

Step 1: Structures of maleic and fumaric acids.
Both have formula \(HOOC-CH=CH-COOH\).
Step 2: Difference in arrangement around double bond.
Maleic acid: cis form (COOH groups on same side).
Fumaric acid: trans form (COOH groups on opposite sides).
Step 3: Type of isomerism.
Cis-trans due to restricted rotation around double bond is geometrical isomerism.
Final Answer:
\[ \boxed{\text{(B) Geometric Isomers}} \]