Which symbol on the rear of a lorry indicates the presence of corrosive substances?

• A. Red with flame
• B. Green with canister
• C. Yellow with flame on circle
• D. Black and white with liquid poured onto hands/surface

Answer: (D)

Recognising hazard symbols is about understanding what the picture is warning you about. The corrosive warning is shown as a black and white image of a liquid pouring onto a hand and onto a metal surface, illustrating chemical burns to skin and damage to materials. This is exactly what corrosive substances can do, so the symbol is used on packaging and vehicles to tell handlers to take precautions like wearing gloves and avoiding contact with metals. It’s the best choice because it directly communicates the danger of corrosion—damage to skin and metal—unlike the other symbols, which indicate different hazards such as flammability or other risks.