Chemistry
Grade-10
Easy
Question
In the reaction
2Ca(s) + O2(g) → 2CaO(s), calcium is _______
- Reduced
- Synthesized
- Oxidized
- None of the above
Hint:
Oxidation state of Ca changes from 0 to +2.
The correct answer is: Oxidized
Oxidation is the loss of electrons during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased.
2Ca(s) + O2(g) → 2CaO(s)
In the reactant oxidation of Ca is 0 and in the product oxidation state of Ca is +2. Calcium is oxidized.
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