Question # 1

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

In the redox reaction between zn and HCI. the oxidizing agent is:

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zn

H⁺

C

H²

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

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

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Cu

AgNO3

Cu(NO3)2

Ag

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

It is a good reducing agent

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Fe

H

C

O

Addition of OXYGEN is called.

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Reduction

Conduction

Oxidation

Nil

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

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9th Class Chemistry Chapter 7 Electrochemistry English Medium KPK Boards Online Test MCQs With Answers

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