Question # 1

Which one of the following is a galvanic cell?

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Daniel cell

Nelson's cell

Down's cell

Both B and C

CO2 the oxidation number of C =.

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+1

+2

+3

+4

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

By electrolytic refining of copper , it is ____________ % pure.

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98

99

99.99

100

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

____________ is an irreversible cell.

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Dry cell

Chargeable cell

Zn cell

None of these

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

____________ do not conduct electricity.

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Electrolyte

Non-electrolyte

Both

Nil

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

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