Q. A quantity of electric charge that brings about the deposition of 4.5 g Al from  A l -  at the cathode will also produce the following volume (STP) of  H 2 ( g )  from  H +  at the cathode.
1. 44.8 L
2. 22.4 L
3. 11.2 L
4. 5.6 L
 

Dear Student,

Reaction Involved:Al3++32H23H++Al1 Faraday = 1 equivalentEquivalent weight of Aluminium(Al) =273=9 gmNumber of equivalents of Al = Al weightEq. weight=4.5 g9 g=0.5Hence, Required Faraday = 0.5Equivalents H2 produced = 0.5 eqVolume occupied = Volume at STP (VSTP)2=22.42=11.2 LHence, for 0.5 volume occupancy = 11.2×0.5 = 5.6 L

Therefore, option (4) is correct.

Hope this information clears your doubts about the topic.

Keep asking!!

Regards

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