**Electrochemistry Most Important Questions HSC 2022**

__1. Define__- Molar Conductivity
- Cell Constant
- Resistivity and Conductivity (with S.I units)
- Cell voltage

__2.Distinguish__- Electrolytic conductivity and molar conductivity

**3.**

__Theory Questions__- Law :- Kohlraush Law
- Write the Nernst equation and explain the terms involved.
- Define electrochemical series & it's applications.
- Calomel Electrode and It's Application
- Fuel Cell
- Standard Hydrogen Electrode
- Electrolysis of fused NaCl
- Appliciations Of All Cells
- Why is Nickel Cadmium referred to as a secondary cell? Write working of NICAD storage cell. Also write its applications.

**4.Numericals (Please Try Solving Solved Examples From Text-book)**

- Represent the galvanic cell from following overall cell reaction - 3Ni(s) + 2Al3+(1 M) → 3Ni2+(1 M) + 2Al(s)
- How many moles of electrons are required for reduction of 2 moles of Zn2+ to Zn ?

(Ans: 4 moles)

- Calculate standard cell potential of following galvanic cell: Zn/Zn2+(1 M) // Pb2+(1 M)/Pb. If E0 Pb = 0.126V and E0 Zn = -0.763V

(Ans: 0.889V)

- Calculate molar conductivity at zero concentration for CaCl2 and NaCl. Given: molar ionic conductivities of Ca2+, Cl- , Na+ ions are respectively, 104, 76.4, 50.1 â„¦-1 cm-2mol-1 (Ans:256.8â„¦-1 cm2mol-1 and 126.5â„¦-1 cm2mol-1 )
- Write a mathematical formula for mole ratio. How long will it take to produce 2.415g of Ag metal from its salt solution by passing a current of 3A? Molar mass of Ag= 107.9 gmol-1 (Ans: 720 s or 12 min.)