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When aluminium oxide (Al(2)O(3)) is elec...

When aluminium oxide `(Al_(2)O_(3))` is electrolysed for the production of aluminium metal. For a given quantity of electricty, the number of moles of aluminium obtained if the volume of `O_(2)` gas obtained is 201.6 litre measured at NTP, is

A

9

B

6

C

12

D

4.5

Text Solution

Verified by Experts

The correct Answer is:
C
Number of equivalents of oxygen `= (201.6)/(5.6) = 36`
(Equivalent volume of oxygen `= 5.6` litre at NTP)
`:.` Number of equivalents of `Al = 36`
Mass of aluminium `= 36 xx 9 g`
Number of moles of aluminium `= (36 xx 9)/(27) = 12`
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