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Batteries
Chapter Name : Electrochemistry
Sub Topic Code : 102_12_03_07_01
Topic Name : Batteries
Sub Topic Name : Primary Batteries
Introduction

• Primary batteries are electrochemical cells which are non-rechargeable and non-reusable. • The most commonly used primary battery is a dry cell(also called as Leclanche cell). • Mercury cell is another example of primary battery. . .

Pre-Requisites:

• Redox reactions • Electrochemical cells

Activity:

Different cells used in watches, remotes, flash lights.

Real Life Question:

What are the types of cells used in watches, flash lights?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Electrochemical or galvanic cell A device in which chemical energy released during a chemical reaction is converted into electrical energy.
Primary battery Cells in which the reaction occurs only once and thus are non-rechargeable, non-reusable.
Electrodes Metallic rods dipped in the electrolyte solution.
Anode It is a positively charged electrode, where electrons are released or oxidation occurs.
Cathode It is a negatively charged electrode, where electrons are accepted or reduction occurs.
Cell potential The potential difference between the two electrodes of a galvanic cell.
Learning aids / Gadgets
Gadgets How it can be used
Cell used in watch This is an example of mercury cell.
Cell used in TV remote This is an example of dry cell.
Real life uses :

• Used in watch, flash light, torch.

Places to visit :

Home.

Practical examples around us
Examples Explainations
Home Cells used in torches, watches are made of electrochemical cells.
What you learn in Theory:

What are primary batteries?

What you learn in Practice:

Uses of primary battery.

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