461.Why fluorine shows an oxidation state of – 1 only?
Fluorine is the most electronegative element and its electronic configuration is 1s2 2s2 3p5 hence it is short of only one electron to complete the nearest noble gas configuration. For this reason, fluorine shows an oxidation state of – 1.
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462.Arrange the following in order of decreasing property indicated: (a) M—F, M—Cl, M—Brand M— l. (Ionic character) (b) F2,Cl2,Br2,I2. (reactivity)
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463.Fluorine can not be prepared from fluorides by chemical treatment. Why?
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464.Name two compounds in which halogens exhibit + ve oxidation states.
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465.Which halogen does not show positive oxidation state?
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466.
Name the radioactive halogen.
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467.Arrange the halogens in order of their m.pt. and b.pt.
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468.Which halogen will produce O2 and O3, on passing through water?
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469.OF2 is called oxygen difluoride rather than fluorine oxide, why?
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470.
Write the balanced chemical equation for the reaction of Cl2 with hot and concentrated NaOH. Is this reaction is redox reaction? Justify.
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