Question # 1

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

Gain of electrons in a reaction is called ____________reaction.

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Oxidation

Reduction

Both

Nil

It is a good reducing agent

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Fe

H

C

O

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

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

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H2S

Br2

S

2HBr

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

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

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

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

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