1. The problem statement, all variables and given/known data I have attached the question and necessary infromation 2. Relevant equations 3. The attempt at a solution so here's what I would say "Unlikely as the peaks in the IR spec are very similar, no additional peaks have shown" BUT THE MARK SCHEME SAYS Vanillin IS likely to have formed; as the IR spectrum shows absorption for C=O; at about 1740-1720; this is ABSENT IN THE IR SPEC of 2-methoxyphenol BUT IT CLEARLY IS NOT, the PEAK IS CLEARLY THERE IN BOTH SPECTRA What are they talking about???