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प्रश्न
Find the oxidation state of sodium in Na2O2.
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उत्तर
Let the oxidation state of Na be x. The oxidation state of oxygen, in case of peroxides, is –1.
Therefore,
2(x) + 2(-1) = 0
2x - 2 = 0
2x = 2
x = +1
Therefore, the oxidation sate of sodium is +1.
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\[\ce{O^{2-}2 + H2O ->}\]
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| Column I | Column II |
| (i) CaCO3 | (a) Dentistry, ornamental work |
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| (iii) CaO | (c) Most negative E value among alkali O metals. |
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| (d) Used in white washing |
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| Column I | Column II |
| (i) Cs | (a) Apple green |
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| (iv) Ca | (d) Yellow |
| (v) Sr | (e) Crimson red |
| vi) Ba | (f) Blue |
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