Question # 1

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

Addition of OXYGEN is called.

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Reduction

Conduction

Oxidation

Nil

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

____________ do not conduct electricity.

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Electrolyte

Non-electrolyte

Both

Nil

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

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

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

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9th Class Chemistry Chapter 9 Table of Elements and Their Symbols English Medium KPK Boards Online Mcqs MCQs With Answers

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