Ok so... the beginning of this question is fairly easy... you know its an alcohol from the OH group in the infrared spectrum.
Then, you can work out the different integral ratios... that tells you the 0.4 one is ROH and the rest. Have I gone wrong in my PPM notation? Because I can CLEARLY see that the 1.5 PPM one should be an R3CH according to the data sheet... yet the mark scheme answer has no CH in their molecule?? I get very lost once we have to start putting the molecule together... if someone could show me how it's done in a logical manner I would be insanely greatful...