These are physical properties of an element

(A) Sublimation enthalpy

(B) Ionisation enthalpy

(C) Hydration enthalpy

(D) Electron gain enthalpy

The total number of above properties that affect the reduction potential is ____________ (Integer answer)

For the cell

Cu(s) | Cu²⁺ (aq) (0.1 M) || Ag⁺(aq) (0.01 M) | Ag(s)

the cell potential E₁ = 0.3095 V

For the cell

Cu(s) | Cu²⁺ (aq) (0.01 M) || Ag⁺(aq) (0.001 M) | Ag(s)

the cell potential = ____________ $$\times$$ 10^$$-$$2 V. (Round off the nearest integer).

[Use : $${{2.303RT} \over F}$$ = 0.059]

The conductivity of a weak acid HA of concentration 0.001 mol L^$$-$$1 is 2.0 $$\times$$ 10^$$-$$5 S cm^$$-$$1. If $$\Lambda _m^o$$(HA) = 190 S cm² mol^$$-$$1, the ionization constant (K_a) of HA is equal to ______________ $$\times$$ 10^$$-$$6. (Round off to the Nearest Integer)

Consider the cell at 25$$^\circ$$C

Zn | Zn²⁺ (aq), (1M) || Fe³⁺ (aq), Fe²⁺ (aq) | Pt(s)

The fraction of total iron present as Fe³⁺ ion at the cell potential of 1.500 V is x $$\times$$ 10^$$-$$2. The value of x is ______________. (Nearest integer)

(Given : $$E_{F{e^{3 + }}/F{e^{2 + }}}^0 = 0.77V$$, $$E_{Z{n^{2 + }}/Zn}^0 = - 0.76V$$)