Question

1) 1:8 3) 1:16 - oxygen fuel cell, 67.2 litre of 36F The ratio of mass of hydrogen al 26 deposited by the same amount of elec from H SO and MgSO, is 2) 1:12 R 32 4) 1:32 93. In a hydrogen - oxygen fuel cell, 675 12 at S.T.P is used in 5 min. What is the a average current produced? 2) 643.33 amp 4) 1930 amp An electric current is passed through a copper voltameter and a water voltameter connected in series. If the copper of the copper roltameter new weights 16mg less, hydroge 1) 549.4 amp 3) 965 amp

NEET/Medical Exams

Chemistry

Solution

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H oxidied at anode: [ mathrm{H}_{2}+2 mathrm{OH} rightarrow 2 mathrm{H}_{2} mathrm{O}+2 mathrm{e}^{-} ] Oxidised at Cathode. [ 0,2+2420+4 e^{-} longrightarrow 10 H^{-} ] Imole of ( H_{2} rightarrow 2 ) mols ob ( e^{prime} ) So. ( 22.4 L rightarrow quad 2 ) moles of ( R ) ( Rightarrow quad b 7 r 2 L=frac{2 times 67.2}{22.4}=6 ) moles ob ( e^{-} ) I mole of e- produces ( 9.65 times 10^{4} ) s c/mole. ( therefore ) GMolus " ( =6 times 9.65 times 10^{4} ) Clmok [ 1=Q / t=frac{6 times 9.85 times 10^{4}}{5 times 60}=1930 mathrm{A} ]