Question # 1

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

CO2 the oxidation number of C =.

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+1

+2

+3

+4

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

____________ agents gains electrons in chemical reaction.

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Reduction

Oxidation

Both

None of these

____________ is an irreversible cell.

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Dry cell

Chargeable cell

Zn cell

None of these

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