Class 11 Chemistry Redox Reaction

What is the oxidation number of P in NaH2PO4

• -5

• +5

• -4

• +3

Oxidation Number of H2 in free or uncombimed state.

• 0

• +1

• -1

• None of the above

Which is the oxidising agent in the equation: 2FeCl3 + H2 ---> 2FeCl2 + HCl

• FeCl3

• FeCl2

• H2

• HCl

In which SO2 acts as oxidant,while reating with:

• Acidified KMnO4

• Acidified K2Cr2O7

• H2S

• Acidified C2H5OH

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

• Decolouration of Blue CuSO4 solution by iron

• Formation of Fe(CO)5 from Fe

• Rusting of iron sheets

• Liberation of H2 from steam by iron at high temperature

Which of the following reactions should be balanced in basic medium

• NH3 + MnO4(-) --------> MnO2 + NO2

• Cr(OH)2 + I2 --------> Cr(OH)2 +2I(-)

• H2O2 + Fe(3+) -------> O2 + Fe(2+)

• HNO3 + Fe(2+) ---------> Fe(3+) + NO2