Which carbon atom of glucopyranose numbered from $\mathrm{C}-1$ to $\mathrm{C}-6$ is anomeric?

Calculate molality of the solution containing nonvolatile solute if boiling point elevation of the solution is 0.2 K

$$ \left[\mathrm{K}_{\mathrm{b}}=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right] $$

Identify the reagent ' $R$ ' used in the following reaction.

Ketone $\xrightarrow{\mathrm{R}}$ Semicarbazone

Identify substrate ' $A$ ' in the following reaction.

$\mathrm{A}+\mathrm{CO}_2 \xrightarrow[6 \text { atm }]{398 \mathrm{~K}}$ Sodium salicylate $\xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}}$Salicylic acid