CUET Level I JEE Mock Test -7 (Chemistry)

.The oxidation number of an atom in the elemental state is

• -1

• 0

• 1

• 2

Find the oxidation state of I in H₄IO₆^–

• +5

• +7

• +1

• -1

.The oxidation number of iron in Fe₃O₄ is

• +2

• 8/3

• 2/3

• +3

What is known as Auto-oxidation?

• None of the above

• Formation of H2O2 by the oxidation of H2O

• Formation of H2O by the oxidation of H2O2

• Oxidation or reduction

The tendency of an electrode to lose electrons is known as

• Electrode potential

• E.M.F

• Oxidation potential

• Reduction potential

equal volumes of 1M KMnO4 and 1M K2Cr2O7 solutions are allowed to oxidize Fe2+ in acidic medium. The amount of iron oxidized will be

• More with KMnO2

• More with K2Cr2O7

• Equal with both oxidising agents

• Cannot be determined

The oxidation state of Cr in Cr (Co)6

• 2

• 0

• 6

• 4

The oxidation number of Mn is maximum in

• MnO2

• K2MnO4

• KMnO4

• Mn3O4

The oxidation number of Mn is maximum in

• MnO2

• KMnO4

• Mn3O4

• K2MnO4

The oxidation process involves

• Decrease in oxidation number

• No change in oxidation number

• Increase in oxidation number

• None of the above