The boiling point elevation and freezing point depression of solutions have a number of partical applications. Ethylene glycol (CH_(2)OH-CH_(2)OH) is used in automobile radiatiors as an antifreeze because it lowers the freezing point of the coolant. The same substance also helps to prevent the radiator coolant from boiling away by elevating the boiling point. Ethylene glycol has low vapour pressure. We can also use glycerol as an antifreeze. In order for the boiling point elevation to occur, the solute must be non-volatile, but no such restriction applies to freezing point depression. For example, methanol (CH_(3)OH), a fairly volatile liquid that boils only at 65^(@)C, is sometimes used as an antifreeze in automobile radiators.
`124 g` each of the two reagents glycol and glycerol are added in `5 kg` of water of the radiators in two cars. Which of the following statements is wrong?
(a)Both will act as antifreeze.
(b)Glycol will be better.
(c)Glycerol is better because its molar mass is greater than glycol.
(d)all of these

Options

A. Both will act as antifreeze.
B. Glycol will be better.
C. Glycerol is better because its molar mass is greater than glycol.
D. All of these

Answer

To solve the problem, we need to analyze the statements given in the question based on the properties of ethylene glycol and glycerol as antifreeze agents.

### Step-by-Step Solution:

1. **Understanding the Context**:
- Ethylene glycol (C₂H₆O₂) and glycerol (C₃H₈O₃) are both used as antifreeze in automobile radiators. The question asks us to determine which statement about their effectiveness as antifreeze is incorrect.

2. **Analyzing Statement (a)**:
- "Both will act as antifreeze."
- Ethylene glycol is explicitly mentioned as an antifreeze in the provided text. Glycerol is also noted as a potential antifreeze. Thus, this statement is **true**.

3. **Analyzing Statement (b)**:
- "Glycol will be better."
- The effectiveness of an antifreeze can be determined by the freezing point depression, which is inversely proportional to the molar mass of the solute. Since ethylene glycol has a lower molar mass (62 g/mol) compared to glycerol (92 g/mol), it will cause a greater depression in freezing point. Therefore, this statement is also **true**.

4. **Analyzing Statement (c)**:
- "Glycerol is better because its molar mass is greater than glycol."
- This statement is **incorrect**. A higher molar mass does not make a substance a better antifreeze; in fact, it makes it less effective in lowering the freezing point. Thus, this statement is wrong.

5. **Analyzing Statement (d)**:
- "All of these."
- Since we have identified that statement (c) is incorrect, statement (d) is also **false**.

### Conclusion:
The wrong statement among the options is **(c)**: "Glycerol is better because its molar mass is greater than glycol."

### Final Answer:
(c) Glycerol is better because its molar mass is greater than glycol.

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