Question

Number of isomeric compounds with molecular formula $C _9 H _{10} O$ which (i) do not dissolve in $NaOH$ (ii) do not dissolve in $HCl$ (iii) do not give orange precipitate with 2,4-DNP (iv) on hydrogenation give identical compound with molecular formula $C _9 H _{12} O$ is _________

Answer 1

The correct answer is 2
As per the language of given question, the best possible isomeric structure is Ph−CH=CH−O−CH3​ (cis and trans). So, the answer is 2.