Civil Services HPPSC (Himachal Pradesh) HPAS Mock Test 2021 General Science Chemistry Chemical Reaction
Which of the following statement is correct about Oxidation Reaction.
(i) Gain of electron
(ii) Addition of Oxygen
(iii) Increase in Valency
1
(i) and (ii)
2
(i) and (iii)
3
(ii) and (iii)
4
(i) (ii) and (iii)