Which of the following solutions does not flow in either direction, when separated by semipermeable membrane? (Molar mass : glucose = 180, urea = 60)

For the reaction, $$3 \mathrm{I}_{(\mathrm{aq})}^{-}+\mathrm{S}_2 \mathrm{O}_{8(\mathrm{aq})}^{2-} \longrightarrow \mathrm{I}_{3(\mathrm{aq})}^{-}+2 \mathrm{SO}_{4(\mathrm{aq})}^{2-}$$, rate of formation of $$\mathrm{SO}_4^{2-}$$ is $$0.022 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{sec}^{-1}$$. What is rate of formation of $$\mathrm{I}_{3(\mathrm{aq})}^{-}$$ ?

When alcoholic solution of an organic compound is treated with few drops of Schiff's reagent, pink colour appears. This confirms the presence of group

What is O$$-$$O bond length in resonance hybrid of ozone?