Question

Check whether $F{e_2}{O_3}$ is dissolved in $NaOH$.
A. True
B. False

Answer 1

Hint: The inorganic compound iron(III) oxide, also known as ferric oxide, has the formula\[F{e_2}{O_3}\]. Iron(II) oxide \[\left( {FeO} \right)\], the rarer form, and iron(II,III) oxide \[\left( {F{e_3}{O_4}} \right)\] , which occurs naturally as magnetite, are the other two major oxides of iron.

Complete answer:
It is unlikely that \[F{e_2}{O_3}\] can be fully separated by etching with \[NaOH\] . \[F{e_2}{O_3}\] can be dissolved with a sufficient amount of \[HCl\]. \[NaOH\] solution will re-precipitate the dissolved separated to \[F{e_2}{O_3}\] from hydrated \[F{e_2}{O_3}\].
A reddish-brown precipitate of iron(II) hydroxide, insoluble in excess of the reagent (in contrast to aluminium and chromium), is obtained with sodium hydroxide solution.
$F{e^{3 + }} + 3O{H^ - } \to Fe{\left( {OH} \right)_3} \downarrow $
No, $F{e^{ + 3}}$ gives ppt. with $NaOH$
So, the correct option is: (B) False

Additional Information:
Uses of iron oxide- \[F{e_2}{O_3}\]
1. Copperplate and die stamping inks have both used ordinary black iron oxide.
2. Iron oxides are a major component of products in the pharmaceutical, paint, rubber, ink, and cosmetic industries.
3. Titanium dioxide is a natural pigment that is used as a pigment.
4. Its salt is used as a flocculant in wastewater treatment, textile dyeing, fertiliser processing, and feed additive production.
5. In the jewellery industry, it's used as a polishing material.

Note:
When you breathe in iron oxide, it can harm you. Metal fume fever can be caused by exposure to Iron Oxide fumes. A metallic taste, headache, chills, aches, chest tightness, and cough are all signs of this flu-like illness. Long-term or prolonged contact with iron can discolour the eyes and cause permanent staining.