Chemistry - Complete Pblock- Question with Solution | TestHub

Heating malonic acid (CH₂(COOH)₂) with a powerful dehydrating agent like phosphorus pentoxide (P₄O₁₀) at $150^{\circ }C$ results in the removal of two molecules of water. This dehydration process yields carbon suboxide (C₃O₂), an unusual oxide of carbon with a linear structure represented as O=C=C=C=O. Therefore, the compound (X) is carbon suboxide, making Option (B) the correct answer.