1.

How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66g of diborane

Answer»

0.8 hours
3.2 hours
1.6 hours
6.4 hous

Solution :`B_(2)H_(6)+3O_(2)toB_(2)O_(3)+3H_(2)O`
1 mol 3 mol
3 mol `O_(2)` is required for burning 1 mol `B_(2)H_(6)`
`H_(2)O overset("ELECTROLYSIS")toH_(2)+(1)/(2)O_(2)"(V.F. of "O_(2)=4)`
`("Equivalent of "O_(2))/("V.F. of "O_(2))=" mol of "O_(2)=3`
`[((100A)xxtsec)/(96500)]xx(1)/(4)=3`
`thereforet=(3xx96500)/(100xx3600)hr.=3.22hrs`.


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