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प्रश्न
______ is used for hardening steel.
विकल्प
Manganese
Copper
Zinc
Nickel
MCQ
रिक्त स्थान भरें
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उत्तर
Manganese is used for hardening steel.
Explanation:
Manganese is critical for steel hardening, as it increases tensile strength, toughness, and wear resistance. It also serves as an effective oxidizer in a manufacturing process, eliminating contaminants such as oxygen and sulfur.
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