Question

Which one of the following could not be liberated from a suitable electrolyte by the passage of 0.25 faraday of electricity through that electrolyte
1)0.25mole of Ag. 2)16gm of cu
3)2gm of O2. 4)2.8lit of H2at sTP

Answer 1

Answer:

 option  2 ) 16 gm of cu.  

Explanation:

 0.25 faraday of electricity is enough to produce

0.25 mole of Ag

2 gm (  0.0625 mole ) of O₂

2.8 lit ( 0.125 mole ) of H₂

but 0.25 faraday of electricity produces only 7.9 ≅ 8 gm of cu.

thus option 2 ) is the correct answer.

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Answer 2

Explanation:

option 2 ) 16 gm of cu.

Explanation:

0.25 faraday of electricity is enough to produce

0.25 mole of silver

2 gm ( 0.0625 mole ) of oxygen

2.8 lit ( 0.125 mole ) of hydrogen

but 0.25 faraday of electricity produces only 7.9 ≅ 8 gm of cu.

thus option 2 ) is the correct answer.

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