Question

Which of the following is not correct with regards to oxidation number?

(1 Point)

The oxidation number of oxygen is always -2 in its compounds

The algebeic sum of oxidation numbers of all elements in a compound is zero

Oxidation number of halogen in their compounds is -7

The oxidation number of fluorine is -1 in all its compounds

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Answer 1

Answer:

answer is -2

Explanation:

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Answer 2

Out of the following that is not correct with regards to oxidation number is,

Oxidation number of halogen in their compounds is -7

Explanation:

• Halogens are electronegative elements and they are present in the p-block of the periodic table.
• They have seven valence electrons in its valence which means they are short of one electron to attain the octect.
• Hence their valency is not seven but is $-1$.

• Oxidation number of halogens if present in a compound hence will be $-1.$

• All the other statements given are correct.