Which of the following given statements is/are correct?
(a) cold cream is an example of (W/O) type emulsions,
(b)electrical conductance of aqueous emulsions is less than that of oil emulsions
(c) emulsions cannot be broken into constituent liquids by heating or freezing
(d) an emulsion can be diluted with water, then it forms (O/W) type emulsion

Options

A. (a) and (d)
B. only (a)
C. (a), (b) & (c)
D. (a) ,(c) & (d)

Answer

To determine which of the given statements about emulsions is correct, let's analyze each statement one by one.

### Step 1: Analyze Statement (a)
**Statement (a): Cold cream is an example of (W/O) type emulsions.**

- Cold cream is a cosmetic product that consists of water and oil. In cold cream, the dispersed phase is water and the dispersion medium is oil. Therefore, it is classified as a water-in-oil (W/O) emulsion.

**Conclusion:** This statement is **correct**.

### Step 2: Analyze Statement (b)
**Statement (b): Electrical conductance of aqueous emulsions is less than that of oil emulsions.**

- Aqueous emulsions have water as the dispersion medium, which is a good conductor of electricity. On the other hand, oil emulsions have oil as the dispersion medium, which is a poor conductor. Therefore, the electrical conductance of aqueous emulsions is greater than that of oil emulsions.

**Conclusion:** This statement is **incorrect**.

### Step 3: Analyze Statement (c)
**Statement (c): Emulsions cannot be broken into constituent liquids by heating or freezing.**

- Emulsions are generally unstable and can be broken down into their constituent liquids through processes such as heating or freezing. This process is known as demulsification.

**Conclusion:** This statement is **incorrect**.

### Step 4: Analyze Statement (d)
**Statement (d): An emulsion can be diluted with water, then it forms (O/W) type emulsion.**

- If an emulsion is diluted with water, and if the original emulsion was oil-in-water (O/W), it will remain an O/W emulsion. If it was water-in-oil (W/O), diluting with water will convert it to an O/W emulsion. Thus, this statement is correct in the context of emulsions being diluted with water.

**Conclusion:** This statement is **correct**.

### Final Conclusion
The correct statements are (a) and (d). Therefore, the answer is:

**Answer:** (a) and (d) are correct statements.

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