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Standard X
Chemistry
Valency and Oxidation states
Which of the ...
Question
Which of the following statements is not true for halogens?
A
All but fluorine show positive oxidation states
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B
All are oxidizing agents
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C
All form monobasic oxyacids
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D
Chlorine has the highest electron-gain enthalpy
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Solution
The correct option is
A
All but fluorine show positive oxidation states
Due to fluorine's high electronegativity and small size, it forms only one oxoacid,
H
O
F
. The oxidation number of
F
is +1 in
H
O
F
.
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