Batteries

Commercial electrochemical cells are

• Batteries

• Galvanic cells

• Concentration cells

• Electrolytic cells

Primary cells are

• can not be used again.

• recharged again and again

• reactions can not be reversed

• Both 1 &3

Secondary cells also called as

• Voltaic cells

• Leclanche cells

• Storage cells

• Galvanic cells

.....................are Characteristics of a battery

• Occupies large place

• Portable ,High efficiency ,Long cycle life ,Long shelf life

• Should drop voltage suddenly

• low efficiency

Tolerance towards heat and fluctuations called as--------------

Fuel cells can convert the chemical energy present in a----------- in to electrical energy .

In Zinc -Air cell ----------- is cathode

• Zn plate

• Powdered MnO₂ and Carbon

• Oxygen from Air

• KOH or NaOH

In Lithium Ion batteries also called as

• Swing Cells

• Coined cells

The voltage of Magnesium -Copper reserve cell is

• 3.3 V to 3.5 V

• 1.25V to 1.50 V

• 1.65

• 1.56

In Lithium-ion cells the electrolyte is the mixture of ------------ and ----------

• LiAsF6

• LiBF4

• LiClO4

• All of them