The oxidation state of a element in its uncombined state is

(a)

zero

(b)

+1

(c)

-1

(d)

none

Fe2 + \(\longrightarrow\) Fe³⁺ + e^- is a ________ reaction.

(a)

redox

(b)

reduction

(c)

oxidation

(d)

decomposition

Assertion : Fluorine has an oxidation state of - 1 in all its compounds.
Reason : Fluorine is the most electronegative element of the periodic table.

(a)

Both assertion and reason are correct and the reason is the correct explanation for the assertion.

(b)

Both assertion and reason are correct but reason is not the correct explanation for the assertion

(c)

Assertion is true but reason are false.

(d)

Both assertion and reason are false.

The oxidation number of oxygen in O₂ is__________

(a)

0

(b)

+1

(c)

+2

(d)

-2

The oxidation number of hydrogen in LiH is _________

(a)

+1

(b)

-1

(c)

+2

(d)

-2