CH₄ is absorbed on 1g charcoal at 0$$^\circ$$C following the Freundlich adsorpiton isotherm 10.0 mL of CH₄ is adsorbed at 100 mm of Hg, whereas 15.0 mL is adsorbed at 200 mm of Hg. The volume of CH₄ adsorbed at 300 mm of Hg is 10^x mL. The value of x is _________ $$\times$$ 10^-2.

(Nearest integer) [Use log₁₀2 = 0.3010, log₁₀3 = 0.4771]

CO₂ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO₂ adsorbed becomes 64 times when the pressure of CO₂ is doubled. The value of n in the Freundlich isotherm equation is ____________ $$\times$$ 10^$$-$$2. (Round off to the Nearest Integer)

100 ml of 0.0018% (w/v) solution of Cl^$$-$$ ion was the minimum concentration of Cl^$$-$$ required to precipitate a negative sol in one h. The coagulating value of Cl^$$-$$ ion is _________ (Nearest integer)

For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and log p (x-axis) gives a straight line. The intercept and slope for the line is 0.4771 and 2, respectively. The mass of gas, adsorbed per gram of adsorbent if the initial pressure is 0.04 atm, is ______ $$ \times $$ 10^–4 g.
(log 3 = 0.4771)