Question # 1

CO2 the oxidation number of C =.

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+1

+2

+3

+4

____________ is an irreversible cell.

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Dry cell

Chargeable cell

Zn cell

None of these

It is a good reducing agent

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Fe

H

C

O

____________ do not conduct electricity.

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Electrolyte

Non-electrolyte

Both

Nil

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

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

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

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Chemistry 9th Class English Medium Unit 7 Online Test MCQs With Answers

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