The mole fraction of urea in an aqueous urea solution containing 900 g of water is 0.05. If the density of the solution is 1.2 g cm^$$-$$3, then molarity of urea solution is ................

(Given data : Molar masses of urea and water are 60 g mol^$$-$$1 and 18 g mol^$$-$$1, respectively)

Total number of hydroxyl groups present in a molecule of the major product P is ..............

Total number of $$cis\,N - Mn - Cl$$ bond angles (that is $$Mn - N$$ and $$Mn - Cl$$ bonds in cis positions) present in a molecule of $$cis[Mn{(en)_2}C{l_2}]$$ complex is ..................

(en = NH₂CH₂CH₂NH₂)

The amount of water produced (in g) in the oxidation of 1 mole of rhombic sulphur by conc. HNO₃ to a compound with the highest oxidation state of sulphur is ..............

(Given data : Molar mass of water = 18 g mol^$$-$$1)