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WorksheetsModule -3 Sustainable Chemistry for Energy Devices.
Total questions: 10
Worksheet time: 8mins
In concentration cell, the electrode in contact with electrolyte of lower concentration acts as:
Anode
Cathode
Both anode as well as cathode
Neither anode nor cathode
Electrodes used in construction of Li-ion battery:
Porous carbon
LixC6 & Li(1-x)CoO2
NaxC6
NaxC6 & Na(1-x)CoO
Secondary batteries are:
Chargeable
cell reaction is reversible
Have high cycle life
All of the above
In sodium ion battery the electrolyte is made up of:
Aqueous KOH
Aqueous NaOH
NaPF6 in Organic Solvent
H2SO4
Which one of the following is true for fuel cells.
Oxidant and Fuel are continuously supplied
Require no charging
Ecofriendly
All of the above
Photovoltaic cell (PV cell) converts:
Sun light in to electrical energy
Sunlight in to heat energy
Sunlight in to mechanical energy
Mechanical energy in to light energy
Reaction occurring at anode of H2-O2 fuel cell is
H2(g) + 2OH-(aq) → 2H2O(l) + 2e-
O2(g) + 2H2O(l ) + 4e → + 4OH-(aq)
2H2(g) + O2(g) → 4H2O(l)
4H2O(l) → 2H2(g) + O2(g)
oxidation states of Vanadium in anode electrolyte
V2+/V3+
VO2+/VO2+
V5+/V4+
None of the above
One of the battery component is kept aside, such batteries are referred as
Reserve Battery
Secondary battery
Primary battery
Tertiary battery
Two different types of electrodes in asymmetric super capacitors
Faradaic and non-faradaic
platinum and calomel
indicator and reference electrode
metal and metal oxide
