Question # 1

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

The metallic plates through which electrons enters and leaves electrolytes:

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Wires

Electrodes

Both

Nil

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

Nil

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

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

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

Br2 + H2S __ 2HBr + S, which one is oxidizing agent:

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H2S

Br2

S

2HBr

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

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