Question

The self-preservative action of simple syrup is due to _______

• A. \( \text{Higher viscosity} \)
• B. \( \text{Isotonic action} \)
• C. \( \text{Hypotonic action} \)
• D. \( \text{Hypertonic action} \)

Hint:

Think of how high salt or sugar concentrations preserve food – by creating a hypertonic environment that draws water out of microbes. Simple syrup works similarly.

Answer 1

The Correct Option is D

Simple syrup is a concentrated aqueous solution of sucrose (typically 66.7% w/w). Its self-preservative action is primarily attributed to its high sugar concentration, which creates a hypertonic environment. In such a hypertonic solution, microorganisms that may contaminate the syrup lose water by osmosis, leading to dehydration and inhibition of their growth and multiplication. While higher viscosity contributes to the physical stability of the syrup, the primary mechanism of preservation is the high osmotic pressure (hypertonicity) that inhibits microbial proliferation.