Question

The addition of high proportions of manganese makes steel useful in making rails or railroads because manganese:

• A. gives hardness to steel
• B. helps in the formation of oxides of iron
• C. can remove oxygen and sulphur
• D. can show the highest oxidation state of $+7$

Answer 1

Answer: (A), (C)

The correct options are
A gives hardness to steel
C can remove oxygen and sulphur

Manganese gives hardness to steel.and also removes oxygen and sulphur from steel by forming slag.

${Fe}_2{O}_3+3Mn\to 3MnO+2Fe$

$MnO+Si{O}_2\to MnSi{O}_3$

So, the correct options are $A$ and $C$