(a)
Carbon suboxide $(C_{3}O_{2})\ i$s anhydride of malonic acid. It has linear structure. $C - C$ bond length is $130\ \mathring{\mathrm{A}}$ and $C - O$ bond length is 120 $\mathring{\mathrm{A}}$.
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.