On complete reaction of `FeCl_(3)` with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is ________.
(Round off to the Nearest Integer).

3 moles of metal complex with formula Co ( en) _(2) Cl _(3) gives 3 moles of silver chloride on treatment with excess of silver nitrate . The secondary valency of Co in the complex is ___________. (Round off to the nearest integer)

The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of production 'A'. The reaction of 1 mol of 'A' with excess of AgNO_(3) in aqueous medium gives "____________" mol(s) of Ag. (Round off to the Nearest Integer ).

If 250 cm^3 of an aqueous solution containing 0.73 g of a protein A of isotonic with one litre of another aqueous solution containing 1.65 g of a protein B, at 298 K, the ratio of the molecular masses of A and B is ________ xx 10^(-2) ( to the nearest integer).

A 1 molal K_(4)Fe(CN)_(6) solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution which contains 18.1 weight percent of a non electrolytic solute A. The molar mass of A is _____u. (Round off to the Nearest Integer). [Density of water = 1.0 "g cm"^(-3) ]

The reaction 2A + B_(2) to 2AB is an elementary reaction. For a certain quantity of reactants, if the volume of the reaction vessel is reduced by a factor of 3, the rate of the reaction increases by a factor of _________ . (Round off to the Nearest Integer).

If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the boiling of the solution is_____ molal. (Rounded-off to the nearest integer)

15 mL of aqueous solution of Fe^(2+) in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr_(2) O_(7)^(2-) . The molarity of the Fe^(2+) solution is "__________" xx 10^(-2) M . ( Round off to the Nearest Integer ).

When an aqueous solution containing MeCOOK and Me_(3)C-COOK is electrolysed, possible products (s) is//are :

If the activation energy of a reaction is 80.9 kJ mol^(-1) , the fraction of molecules at 700 K, having enough energy to react to form products is e^(-x) . The value of x is ______ ((Rounded off to the nearest integer) [Use R=8.31JK^(-1)mol^(-1) ]