High alkalinity can cause skin burns.

• A. True
• B. False
• C. Sometimes
• D. Not sure

Answer: (A)

High alkalinity means a chemical with a high pH, typically a strong base. Such substances are caustic and can damage skin on contact. When a strong base touches skin, it penetrates and denatures proteins, saponifies fats, and disrupts cell membranes, leading to chemical burns. In construction contexts, materials like wet cement and lime are highly alkaline and can cause burns quickly with direct or prolonged exposure. That’s why the statement is true. If exposure occurs, rinse with plenty of water for at least 15 minutes and seek medical advice for any burn; always use appropriate PPE to prevent contact.