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How long (approximate) should water be e...

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?
(Atomic weight of B = 10.8 u)

A

(6.4hours)

B

(0.8 hours)

C

(3.2hours)

D

(1.6 hour)

Text Solution

Verified by Experts

`B_2H_6+3o_2to B_2o_3+3H_2o`
27.66 g 96 g
Thus,for combusion of 27.66g of `B_2H_6` oxygen required is 96. According to Faraday's law of electrolysis,
`W=ZIt=(E It)/(96500)implies 96g. (8xx100xxt)/(96500)`
`t=(96xx96500)/(8xx100)=11,580s=(11580)/(3600)=3.2h`
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