How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane (Given atomic mass of B=10.8u)A. 0.8 hourB. 3.2 hoursC. 1.6 hoursD. 6.4 hours

How long (approximate) should water be electrolysed by passing through

1.	How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane (Given atomic mass of B=10.8u)A. 0.8 hourB. 3.2 hoursC. 1.6 hoursD. 6.4 hours
Answer» Correct Answer - B (b) `B_(2)H_(6)+3O_(2) to B_(2)O_(3)+3H_(2)O` `2xx10.8+6xx1` `=27.6 g(1mol)` 3 moles of oxygen are produced by the electrolysis of water. `6H_(2)Ooverset("Electrolysis") rarr 6H_(2)+O_(2)` or `6H_(2)O to 12H^(+)+3O_(2)+underset((12F))(12e^(-))` Now `Q=lxxt=(12xx96500" C")=(100" amp")xxt` `t=((12xx96500" C"))/((100" amp"))=11580" s"` `=(11580)/(3600)=3.21" h"`.

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How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane (Given atomic mass of B=10.8u)A. 0.8 hourB. 3.2 hoursC. 1.6 hoursD. 6.4 hours

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