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Question

Calculate the amounts of Na and chlorine gas produced during the electrolysis of fused NaCl by the passage of 1 ampere current for 25 minutes.

A
0.3565 gm and 0.55 gm
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B
0.3565 gm and 0.66 gm
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C
0.55 gm and 0.3565
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D
None of above
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Solution

The correct option is A 0.3565 gm and 0.55 gm
i=1 amp
t=25 min=25×60 sec
Molar mass of Na=23 g mol1
Molar mass of Cl2=71 g mol1
Cl=12(12)=35.5 g
Formula used, m=Molar massn×F×i×t
For Na, n=1
m=231×96500×1×25×60
=0.3575 g

For Cl, n=1
m=35.51×96500×1×25×60
=0.5518 g

The amounts of Na and Cl gas produced are 0.3575 g and 0.5518 g respectively.

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