The gelatinization of Acacia mucilage is associated with which element among the following?

• A. Bi
• B. Fe
• C. Mg
• D. Ca

Answer: (B)

Gelatinization of Acacia mucilage happens when the polymer chains are linked together into a network by multivalent metal ions. The mucilage has acidic or coordinating groups that can bind these ions. When iron ions are present, they can coordinate with multiple sites on different mucilage molecules, acting as cross-links that bridge chains and form a three-dimensional gel network. This cross-linking is what turns a viscous solution into a gel.

Among the options, iron provides the strongest and most effective cross-linking for this particular mucilage, leading to gelatinization more readily than the other ions listed. Bismuth doesn’t typically promote this gelation, and calcium or magnesium are less influential for Acacia mucilage in this context.