Question

line mediumi 103. The charge rey mole of MnO, to MnO2-in ssume 100% current efficiency). 1) 10/3F 2) 6F 104. The density of copper i ea of 10 cm 2) 6F 3) 10F 4) 4F nsity of copper is 8 gm/cc. Num ambs required to plate an area of 10 10 cm on both sides to a thickness of 10- using CuSO, solution as electrolyte is 1) 48,250 2) 24,125 3) 96,500 4) 10,000 15. The same quantity of electricity is passed through 0.1 M H SO, and 0.1 M HCI. Th e thodes art

NEET/Medical Exams

Chemistry

Solution

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2) Mass (depasited) = rhoxvalume ( rho=frac{text { mass }}{text { volume }} ) [ =8 frac{g m}{c c} times 10 times 10 mathrm{cm}^{2} times 10^{-2} mathrm{cm} ] ( =8 g m ) 2) Weight or mas depasited = Equivalint mass x No. Q Fovadays ( Rightarrow quad w=E q cdot x N F ) ( Rightarrow quad N_{F}=8 div frac{635}{2}=frac{8 times 2}{635} ) [ text { "o coloumbs }=M_{F} times 96500=frac{8 times 2}{63.5} times 96500=24314 mathrm{C} ]