Chemistry
Grade-10
Easy
Question
In the reaction
2Ca(s) + O2(g) → 2CaO(s), reductant is _____
- Oxygen
- Calcium
- Both Calcium and Oxygen
- None of the above
Hint:
Reductant itself is oxidized.
The correct answer is: Both Calcium and Oxygen
Reductant is a substance capable of bringing about the reduction of another substance as it itself is oxidized.
In the reaction:
2Ca(s) + O2(g) → 2CaO(s)
The oxidation state of Ca in the left side is 0 and in the right side is +2, Ca is oxidized it is reductant.
The oxidation state of O in the left side is 0 and in the right side is -2, O is reduced it is oxidant.
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