Question # 1

It is a good reducing agent

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Fe

H

C

O

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

Gain of electrons in a reaction is called ____________reaction.

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Oxidation

Reduction

Both

Nil

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

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H2S

Br2

S

2HBr

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

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

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Cu

AgNO3

Cu(NO3)2

Ag

The cathode of Daniel cell is made up of

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Zn

Cu

AI

C

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Addition of OXYGEN is called.

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Reduction

Conduction

Oxidation

Nil

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

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zn

H⁺

C

H²

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

In silver plating Anode is made of:

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Gold

Ag

Neon

Nil

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

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