Q. How many of the following statements refer to 'oxidation'?
i. Addition of oxygen
ii. Addition of electropositive element
iii. Removal of oxygen
iv. Removal of hydrogen
v. Addition of electronegative element
vi. Loss of electrons
vii. Oxidation number of the element decreases

 207  150 Redox Reactions Report Error

Answer: 4

Solution:

Statements and represent oxidation.