Primary Cells
Trending Questions
Q. The EMF of the cell, Cd(s)|CdCl2(aq, 0.1 M)||AgCl(s)|Ag(s) in which the cell reaction is
Cd(s)+2AgCl(s)→2Ag(s)+Cd2+(aq)+2Cl–(aq) is 0.6915 V at 0°C and 0.6753 V at 25°C. The ΔS and ΔH of the reaction at 25°C is:
Take, F=96485 C mol−1
Cd(s)+2AgCl(s)→2Ag(s)+Cd2+(aq)+2Cl–(aq) is 0.6915 V at 0°C and 0.6753 V at 25°C. The ΔS and ΔH of the reaction at 25°C is:
Take, F=96485 C mol−1
- ΔS=−123.8 J K−1 and ΔH=−167.72 kJ
- ΔS=−123.8 J K−1 and ΔH=−180 J
- ΔS=−347.2 J K−1 and ΔH=−634.3 kJ
- ΔS=−101.23 kJ K−1 and ΔH=−167.72 kJ
Q.
In a dry cell, the cylindrical container made of zinc acts as a __________terminal of the cell.
Q. Which colorless gas evolves, when NH4Cl reacts with zinc in a dry cell battery
- NH4
- N2
- H2
- Cl2
Q. Rancho (from Three Idiots) is a curious guy and he is very good in chemistry. Once he removed a battery from a clock and started opening it up battery from a clock and started opening it up. Which of the following observation of Rancho were TRUE?
- There is a cylindrical zinc container.
- A graphite rod is there in the centre and it is surrounded by powdered manganese powder.
- The space between the cylindrical container and graphite rod is filled with a moist paste of ammonium chloride and zinc chloride.
- None of these.
Q.
How many years do NiMH batteries last?
