When sucrose is heated with conc. $HNO_3$,the product is:

Match the structures in Row $I$ with their names in Row $II$.
Row $I$:
$(P)$ $\alpha-D-(+)-$Glucopyranose
$(Q)$ $\beta-D-(+)-$Glucopyranose
$(R)$ $\alpha-D-(-)-$Fructofuranose
$(S)$ $\beta-D-(-)-$Fructofuranose
Row $II$:
$(i)$ $\alpha-D-(-)-$Fructofuranose
$(ii)$ $\beta-D-(-)-$Fructofuranose
$(iii)$ $\alpha-D-(+)-$Glucopyranose
$(iv)$ $\beta-D-(+)-$Glucopyranose
Correct match is:

Which of the following is $NOT$ a disaccharide?

The molecular formula $C_6H_{12}O_6$ corresponds to:

Which of the following are non-reducing sugars?

Heating glucose with Fehling's solution produces a $.........$ colored precipitate.