1.

In the electrolysis of alkaline water , a total of mass 1 mole of gases is volved . The amount of water decomposed is

Answer»

1 mole
2 moles
2/3 mole
1/3 mole

SOLUTION :`H_(2) O to H_(2) + (1)/(2) O_(2)` .
SUPPOSE `H_(2)O` decomposed = x moles . Then `H_(2) = x , O_(2) = (1)/(2) x , i.e., x + (1)/(2) x = 1`
or `(3)/(2) x = 1 or x = (2)/(3)`


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