An element in its free state will have the oxidation number:

+ 1

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- 1

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Solution

The correct option is B 0
Free state means uncombined state, i.e., atomic state. In an uncombined state the oxidation number will always be zero.

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The oxidation number of an element in its free state is always

An element has $[A r] 3 d^{4}$ configuration in its +3 oxidation state. The atomic number of element is:

26

+ 2

The atomic number of the element having magnetic moment equal to 1.7 BM in its +2 oxidation state is:

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