Question

Given below are two statements:
Statement (I): The use of emulsifier improve the whipping properties of ice-cream mix
Statement (II): Emulsifers are used to reduce the size of lactose crystals in ice cream
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct
• B. Both Statement (I) and Statement (II) are incorrect
• C. Statement (I) is correct but Statement (II) is incorrect
• D. Statement (I) is incorrect but Statement (II) is correct

Hint:

Remember the functions of ice cream ingredients:
- Emulsifiers \(\rightarrow\) Lower interfacial tension, promote fat partial coalescence, improve whipping and structure.
- Stabilizers \(\rightarrow\) Bind water, control ice and lactose crystal growth, prevent iciness and sandiness.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Emulsifiers (such as mono- and diglycerides or polysorbate 80) are essential ingredients in ice cream formulation.
They accumulate at the fat-water interface, lowering interfacial tension and regulating the physical stability of the fat emulsion during freezing and whipping.

Step 2: Detailed Explanation:
Let us evaluate both statements:
-Statement (I): "The use of emulsifier improve the whipping properties of ice-cream mix"
This statement is correct.
During freezing, emulsifiers displace some of the milk proteins from the surface of the fat globules.
This displacement makes the fat globules more fragile, promoting controlled fat destabilization and partial coalescence under the mechanical shear of the freezer.
This partially coalesced fat network forms a stable structure around air bubbles, helping the mix incorporate and retain air (overrun), which significantly improves its whipping properties.
-Statement (II): "Emulsifiers are used to reduce the size of lactose crystals in ice cream."
This statement is incorrect.
Emulsifiers act on the fat phase of the ice cream and do not influence the crystallization of lactose in the aqueous serum phase.
Lactose crystal size and crystallization are controlled by:
1. Stabilizers (hydrocolloids like guar gum or carrageenan), which bind free water and limit diffusion.
2. Maintaining stable, low storage temperatures to prevent temperature fluctuations.
3. Limiting the total solids-not-fat (MSNF) content in the formulation.
Therefore, Statement (I) is correct but Statement (II) is incorrect.

Step 3: Final Answer:
Statement (I) is correct but Statement (II) is incorrect, which corresponds to Option (C).