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JEE Main20244 Apr 2024Morning ShiftChemistryElectrochemistryActual

What pressure (bar) of ( H ₂ ) would be required to make emf of hydrogen electrode zero in pure water at (25^ C ) ?

Options

  1. A(10⁻⁷ )
  2. B0.5
  3. C1
  4. D(10⁻¹⁴ )

Correct answer

D. (10⁻¹⁴ )

Step-by-step solution

aligned & 2 e ⁻+2 H ⁺( aq ) H ₂( ~g ) & E = E ^ - 0.059 n P _ H ₂ [ H ⁺ ]^2 & 0=0- 0.059 2 P _ H ₂ (10⁻⁷ )^2 & P _ H ₂ (10⁻⁷ )^2 =0 & P _ H ₂ 10⁻¹⁴ =1 & P _ H ₂ =10⁻¹⁴ bar aligned

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