Question

Which food additive is used as a sequestering agent to prevent oxidative rancidity?

• A. Sodium benzoate
• B. EDTA
• C. Citric acid
• D. Sodium chloride

Hint:

Sequestering agents like EDTA are often used in combination with antioxidants to provide better protection against oxidation in processed foods.

Answer 1

The Correct Option is B

Concept: Oxidative rancidity is a major cause of spoilage in foods containing fats and oils. It occurs due to the oxidation of lipids, leading to off-flavors, odors, and loss of nutritional quality. Metal ions such as iron and copper act as catalysts that accelerate this oxidation process. Sequestering agents, also known as chelating agents, are substances that bind to these metal ions and render them inactive. By doing so, they slow down or prevent oxidative reactions in food systems.
Step 1: Understand the role of sequestering agents.
Sequestering agents:

• Bind metal ions like Fe$^{2+}$ and Cu$^{2+}$
• Prevent these ions from catalyzing oxidation
• Help in extending shelf life of food products

Step 2: Analyze the given options.

• Sodium benzoate – preservative against microbial growth
• EDTA – strong chelating (sequestering) agent
• Citric acid – weak chelating agent, mainly used for acidity
• Sodium chloride – common salt, not a chelating agent

Step 3: Select the most effective agent.
EDTA (Ethylenediaminetetraacetic acid) is widely used in food systems because of its strong ability to bind metal ions and prevent oxidative rancidity.