The total number of unpaired electrons present in the complex K₃[Cr(oxalate)₃] is _____________.

2 molal solution of a weak acid HA has a freezing point of 3.885$$^\circ$$C. The degree of dissociation of this acid is ___________ $$\times$$ 10^$$-$$3. (Round off to the Nearest Integer).

[Given : Molal depression constant of water = 1.85 K kg mol^$$-$$1 Freezing point of pure water = 0$$^\circ$$ C]

For the reaction

2Fe³⁺(aq) + 2I^$$-$$(aq) $$ \to $$ 2Fe²⁺(aq) + I₂(s)

the magnitude of the standard molar Gibbs free energy change, $$\Delta$$_rG$$_m^o$$ = $$-$$ ___________ kJ (Round off to the Nearest Integer).

$$\left[ {\matrix{ {E_{F{e^{2 + }}/Fe(s)}^o = - 0.440V;} & {E_{F{e^{3 + }}/Fe(s)}^o = - 0.036V} \cr {E_{{I_2}/2{I^ - }}^o = 0.539V;} & {F = 96500C} \cr } } \right]$$

Complete combustion of 3g of ethane gives x $$\times$$ 10²² molecules of water. The value of x is __________. (Round off to the Nearest Integer). [Use : N_A = 6.023 $$\times$$ 10²³; Atomic masses in u : C : 12.0; O : 16.0; H : 1.0]