Which of the following has least percentage of carbon:

Correct option is D

The correct answer is (d) Wrought Iron

Wrought Iron: Contains the least percentage of carbon (less than 0.08%). It is highly malleable, tough, and corrosion-resistant, making it ideal for decorative work and outdoor structures.

• Malleable Iron: Contains about 0.2%–0.3% carbon, making it slightly more carbon-rich than wrought iron.
• Pig Iron: Contains the highest percentage of carbon (about 3.5%–4.5%), making it brittle and unsuitable for direct use.
• Stainless Steel: Contains around 0.2%–1.2% carbon, along with chromium and nickel, which enhance its resistance to rust.

• Wrought Iron: <0.08% carbon
• Malleable Iron: 0.2%–0.3% carbon
• Stainless Steel: 0.2%–1.2% carbon
• Pig Iron: 3.5%–4.5% carbon

Carbon:

• Symbol and Atomic Number: C, 6
• Role in Life: Forms the backbone of organic compounds, essential for life on Earth.

Key Characteristics:

• Allotropes: Exists as diamond, graphite, graphene, etc.
• Versatility: Forms stable bonds with many elements, enabling complex molecules.
• Abundance: Found in Earth's crust and atmosphere as carbonates, coal, oil, and CO₂.

Importance:

• Biological Role: Essential for life; found in DNA, proteins, and carbohydrates.
• Industrial Use: Used in fuels, steelmaking, and electronics.