1.

A lead storage battery containing 5.01. of (IN)H_(2)SO_(4) solution is opcrated for 9.65 xx10^(5) s with a stcady current jof 100 mA. Assuming volume of the soution remaining constant, normality of H_(2) SO_(4) will

Answer»

remain tmchanged
increases by 0.20
increase by unity
DECREASE by 0.40

Solution :`({:(Pb+SO_(4)^(2-)to PbSO_(4)+2e^(-)),(PbO_(2)+ 4H^(+)+SO_(4)^(2-) +2e^(-) to PbSO_(4)+2H_(2)O):})/(Pb+PbO_(2)+2H_(2) SO_(4) to 2P bSO_(4)+2H_(2)O)`
The REACTIO INDICATES that 2 moles of `H_(2)SO_(4)`
corresponds ot `2xx96500` C and 2 moles `H_(2)SO_(4) -=4` equive. of `H_(2) SO_(4).`
`2xx96500` C consumed 4 equive. of `H_(2)SO_(4)`
and `100xx10^(-3) xx9.65 xx10^(5)C` consumed
`=(4xx100xx10^(-3) xx9.95 xx10^(5))/(2xx96500)=2`EQUIV. `H_(2) SO_(4)`
`therefore ` Decrease in normality `=2/5=0.40`


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