MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
The reaction 2Mg + O₂ = 2MgO is-
- i. addition
- ii. combustion
- iii. non-redox
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: a i and ii
It is addition and combustion; combustion is redox, so iii fails.
Why the other options are wrong
- b i and iii: iii fails: Mg gives electrons, so it is redox; ii is true.
- c ii and iii: iii fails: combustion is always redox; i is true.
- d i, ii and iii: iii fails: the book puts combustion among redox reactions.
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