What amount of mercury would be liberated if the same quantity of electricity that liberates…

What amount of mercury would be liberated if the same quantity of electricity that liberates 0.65g of zinc is applied?
  • A.
    2.01g
  • B.
    1.00g
  • C.
    4.02g
  • D.
    8.04g
Correct Answer: Option C
Explanation

Zn2+ + 2e– → Zn
2F will be liberated 65g of Zn, if 0.65gm of Zn is liberated, the quantity of electricity used
X = (0.65/65) * 2
= 0.02F
∴ Hg+ + e– → Hg1
i.e 1F → 201gm of Hg
∴ 0.02 will liberated
Y = (0.02/1) * 201
= 4.02g

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