Question # 1

Cu + 2AgNO3 -------> Cu(NO3) +2Ag. In this reaction reducing agent is:

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Cu

AgNO3

Cu(NO3)2

Ag

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

____________ are good conductors of electricity.

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Covalent compound

Metals

Both

None of these

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

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

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H2S

Br2

S

2HBr

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

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