The mass spectrum of compound G shows M and M+1 peaks with heights in the ratio $74:2.5$. Use these figures to work out the number of carbon atoms in G. Show your working.
Use the Data Booklet together with your knowledge of NMR spectroscopy to identify the proton type responsible for each of the three absorptions at $\delta = 1.1\,\text{ppm}$, $2.2\,\text{ppm}$ and $11.8\,\text{ppm}$.
On adding $\text{D}_2\text{O}$, one of these absorptions vanishes. Explain the reason for this and state which absorption is affected.
Draw the structural formula of $G$.
Draw the structural formula of an isomer of $G$ with only two absorptions in its NMR spectrum.
Use the Data Booklet to suggest where these absorptions would appear, giving values of $\delta$ in $\text{ppm}$.