Question # 1

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

The metallic plates through which electrons enters and leaves electrolytes:

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Wires

Electrodes

Both

Nil

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

____________ do not conduct electricity.

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Electrolyte

Non-electrolyte

Both

Nil

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Nelson's cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

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CI₂

H₂

O₃

O₂

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

Nil

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

____________ 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

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