Fluorine can have an oxidation number of .A. `-1` onlyB. `0` onlyC. `-

1.	Fluorine can have an oxidation number of .A. `-1` onlyB. `0` onlyC. `-1,0`D. ` +1` only
Answer» Correct Answer - C Being univalent and most electronegative, `F` has an oxidation nmber of `-1` in all of its compounds. In ` F_2` (free uncombined element), the oxidation number of `F` is zero.

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`0.80 g` of sample of impure potassium dichromate was dissolved in water and made up to `500 mL` solution. `25 mL` of this solution treated with excess of `KI` in acidic medium and `I_(2)` liberated required `24 mL` of a sodium thiosulphate solution. `30 mL` of this sodium thiosulphate solution required `15 mL` of `N//20` solution of pure potassium dichromate. What was the percentage of `K_(2)Cr_(2)O_(7)` in given sample?A. `73.5%`B. `75.3%`C. `36.75%`D. none of these
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Balance the following equations: (i) `Cr_(2)O_(7)^(2-)+I^(-)+H^(+)rarrCr^(3+)+I_(2)+H_(2)O` (ii) `Ag^(+)+AsH_(3)rarrH_(3)AsO_(3)+H^(+)+....`
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Fluorine can have an oxidation number of .A. `-1` onlyB. `0` onlyC. `-1,0`D. ` +1` only

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