During the action of enzyme ‘zymase’ glucose is converted into .............., with the liberation of carbon dioxide gas.

The total number of products formed in the following reaction sequence is

$$\begin{gathered}\mathrm{CH}_3 \mathrm{COCl} \stackrel{\text { (i) }\left(\mathrm{CH}_3\right)_3 \mathrm{Cd}}{\longrightarrow}(P) \\ (P)+\mathrm{CH}_3 \mathrm{CHO} \stackrel{\text { (ii) } \mathrm{NaOH}(a q), \Delta}{\longrightarrow} \text { ? }\end{gathered}$$

In the following reaction sequence, identify product ‘Q’ and reagent ‘R’.

Let $$f: R \rightarrow R$$ and $$g: R \rightarrow R$$ be defined by $$f(x)=2 x+1$$ and $$g(x)=x^2-2$$ determine $$(g \circ f)(x)$$ is equal to