EASY
11th CBSE
IMPORTANT
Earn 100

Which of the following processes does not involve oxidation of iron?

33.33% studentsanswered this correctly

Important Questions on Redox Reactions

EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
Oxidation state of each Cl in CaOCl2 is/are
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I

The oxidation states of S atoms in S4O62- from left to right respectively are

Question Image

 

MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
The oxidation numbers of the sulphur atoms in peroxomonosulphuric acid H2SO5 and peroxodisulphuric acid H2S2O8 are respectively.
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
In acidic medium, H2O2 changes Cr2O72- to CrO5 which has -O-O- bonds. Oxidation state of Cr in CrO5 is
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During this reaction which element undergoes maximum change in the oxidation number. 
MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q I
Choose the disproportionation reaction among the following redox reactions: