NEET Questions - Chemistry - Redox Reactions & Electrochemisty

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Reduction reaction means ____

a process of adding oxygen
a process of removing hydrogen
a process of adding electron
a process of removing electrons

Which substance is oxidizing agent ?

a substance donates hydrogen or accepts oxygen
a substance donates oxygen or accepts hydrogen
a substance experience oxidation
a substance donates electron

Which substance is called reducing agent ?

a substance donates hydrogen or accepts oxygen
a substance accepts hydrogen or donates oxygen
a substance experience reduction
a substance gains electron

Oxidation reaction means

a process of removing electron
a process of adding hydrogen
a process of removal of oxygen
a process of adding electrons

Which of the following is the characterictic of reducing agent ?

it experience oxidation.
it experience reduction
it gains electrons
it gives oxygen

Which of the following is the characteristic of oxidizing agent ?

it experience oxidation.
it experience reduction
it gains oxygen
it donates electrons

Which of the following statement is true ?

there is always reduction occur of oxidizing agent
there is always oxidation occur of reducing agent
oxidation and reduction are supplimentary processes
Given three statements are wrong.

Which of the following statement is wrong ?

there is always reduction occur of oxidizing agent
there is always oxidation occur of reducing agent
oxidation and reduction are supplimentary processes
Given three statements are wrong.

Which of the following does not occur, when a rod of Zn metal is dipped in an aqueous solution of $ CuSO_4 $ ?

blue colour of the oxygen fades gradually.
weight of Zn–metal rod decreases.
weight of metal strip of zinc increases.
colour of the surface of Zn road become saffron–red.

Which of the following observation obtained, when rod of Cu metal is dipped in an aqueous solution of $ AgNO_3 $ ?

No change in the weight of metal rod of Cu occurs.
weight of rod of copper metal decreases
solution become bluish gradually
colour of the surface of rod of Cu metal does not change

Which substance get oxidized in the reaction : $ 2Al + Cr_2O_3 \rightarrow Al_2O_3 + 2Cr $ ?

Al
$ Cr_2 O_3 $
$ Al_2 O_3 $
Cr

Which substance is a reducting agent in the following reaction ? Reaction : $ 2Al + Cr_2O_3 \rightarrow Al_2O_3 + 2Cr $