NEET-XII-Physics
33: Thermal and Chemical Effects of Electric Current
- #19Find the time required to liberate 1.0 litre of hydrogen at STP in an electrolytic cell by a current of 5.0 A.Ans : Let the required time be t.
Mass of 1 litre hydrogen,
`` m=\frac{2}{22.4}\,\mathrm{\,g\,}``
`` ``
Using the formula, m = Zit, we get:
`` \frac{2}{22.4}=\frac{1\times 5\times t}{96500}``
`` \Rightarrow t=\frac{2\times 96500}{22.4\times 5}``
`` \Rightarrow t=1723.21\,\mathrm{\,s\,}=28.7\,\mathrm{\,minutes\,}\approx 29\,\mathrm{\,minutes\,}``
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