Topic 7 - Redox

Question 1

Chemical cell
3 types
Examples

Answer 1

Dry Cells - Zinc-Carbon Cell
Wet Cells - Lead-Acid Accumulator/Car battery
Fuel Cells - Hydrogen-Oxygen Fuel Cell

Question 2

Primary Cell
What is
3 types
Characteristic
Shape
Usage examples

Answer 2

Non-Rechargeable

Zinc-Carbon
Alkaline Manganese
Silver Oxide

Zinc Carbon
Low cost
Low shelf life
Low drained
Cylindrical
Poor in high drained
Torches, clocks

Alkaline manganese
Continuously high discharge rate
Wide range of teko
Expensive for low drain
Cylindrical
Mp3 player

Silver oxide
Small light expensive
Small steady current
Button shaped
Hearing aids, pacemaker

Question 3

Secondary cells
What is
3 types
Discharge rate
Price
Usage

Answer 3

Rechargeable

Lithium-ion Cell - Mobile phones
Nickel-metal hydride cell - indoor wireless phones
Lead-acid accumulator - Car batteries

All high discharge rate
All expensive

Question 4

Environmental Impact of Cells

7.1

Answer 4

Toxic Mercury (ZincCarbon) Cadmium (NickelCadmium)
Solid waste