Which option best completes: segregation helps to reduce the chance of contact between incompatible chemicals, preventing runaway reactions or explosions.

• A. Increases cross-contact risk.
• B. Has no safety benefit.
• C. Is only aesthetic.
• D. Reduces the chance of contact between incompatible chemicals, preventing runaway reactions or explosions.

Answer: (D)

Segregation is about keeping incompatible chemicals apart so they don’t meet and react. When reactive substances are stored or handled separately, the opportunity for a dangerous interaction is greatly reduced. If incompatible chemicals do contact, they can react exothermically, generating heat that may not be removed quickly enough, leading to a runaway reaction, pressure buildup, and possibly an explosion. By design, segregation minimizes this risk and is a fundamental safety practice.

The other options don’t fit because increasing cross-contact risk would raise hazards, claiming no safety benefit contradicts the purpose of segregation, and saying it’s only aesthetic ignores the real safety function of physically separating reactive materials. Thus, the statement about reducing contact between incompatible chemicals to prevent runaway reactions or explosions is the best fit.