I) Chemical effect of electric current can result in the evolution of gas, deposition of a metal or change in colour. Give an example each of a) evolution of gas.
b) change in colour observed.

ii) Which of the solution in the figure is the best conductor of electricity if all the circuits are properly connected? Justify your choice.

do u have any choices to choose from ? ?

i believe it is 40–40–20%

explanation:

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm