If $\mathrm{Cell-OH}$ represents formula of cellulose, identify the formula of cellulose xanthate from following.

Which from following ligands has highest field strength?

Which from following compounds is NOT a mono carboxylic acid?

Find the void volume of bec unit cell in $\mathrm{cm}^3$ if volume of unit cell is $1.5 \times 10^{-22} \mathrm{~cm}^3$.