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Types of Cells: Primary and Secondary

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Questions and Answers

What is the primary characteristic of a primary cell?

Stores energy for later use

Does not generate current internally (correct)

Supplies direct current from an external source

Generates current internally

What is the major function of a secondary cell?

Stores energy for later use (correct)

Charging current converted into chemical energy

Supplies direct current from an external source

Generates current internally

In a Bichromate Cell, what acts as the positive electrode?

Dilute H2SO4

Zinc plate

Carbon plate (correct)

K2Cr2O7

What is added to dilute H2SO4 in a Bichromate Cell to avoid polarization?

Crystals of K2Cr2O7 (C) Signup and view all the answers

What does the green color of the liquid in a Bichromate Cell signify?

Formation of chromic sulphate (C) Signup and view all the answers

When is a Bichromate Cell useful?

When strong current is needed for a short time (C) Signup and view all the answers

What is the example of a primary cell given in the text?

The Dry Cell (A) Signup and view all the answers

What is used as the anode in the Dry Cell?

Zinc (Zn) container (C) Signup and view all the answers

What acts as the depolarizer in the Dry Cell?

MnO2 and carbon (B) Signup and view all the answers

What is the disadvantage of the Dry Cell mentioned in the text?

Voltage drops rapidly when current is drawn (B) Signup and view all the answers

What does the Mercury Cell consist of as the cathode?

HgO and carbon (D) Signup and view all the answers

What is used as the electrolyte in the Mercury Cell?

KOH & ZnO paste (B) Signup and view all the answers

What does the Daniel Cell consist of, dipped in a solution?

CuSO4 (A) Signup and view all the answers

What forms a complex with Zn2+ in the reaction in the Dry Cell?

[Zn (NH3)4]2+ (A), [Zn (NH3)4]2+ (B), [Zn (NH3)4]2+ (C), [Zn (NH3)4]2+ (D) Signup and view all the answers

What is used to prevent diffusion but allow the passage of ions in the Daniel Cell?

{Porous pot} (D) Signup and view all the answers

What potential does the Daniel Cell have?

1.1 V (D) Signup and view all the answers