Question

${A (C10H_18O) ->[{HCL}] P}$ Degree of unsaturation of $A = 2$, it contains no double or triple bonds.

• A.
• B.
• C.
• D. none of these

Answer 1

Answer: (A)

Answer 2

Degree of unsaturation of $C _{10} H _{18} O =2$, but it contains no double or triple bond. Hence there are two rings - one six membered as indicated ty product and the other three membered which is cleaved by HCl due to strain. Hence $A$ has following structure.