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Which of the most viscous ?...

Which of the most viscous ?

A

B

C

D

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The correct Answer is:
To determine which compound is the most viscous among the given options, we need to consider the concept of viscosity and its relationship with hydrogen bonding in alcohols and phenols. ### Step-by-Step Solution: 1. **Understand Viscosity**: - Viscosity is a measure of a fluid's resistance to flow. Higher viscosity means the fluid is thicker and flows less easily. 2. **Identify Factors Affecting Viscosity**: - The primary factor affecting the viscosity of alcohols and phenols is the presence of hydroxyl (–OH) groups. More hydroxyl groups lead to stronger hydrogen bonding, which increases viscosity. 3. **Analyze the Given Compounds**: - Let's consider the given compounds: - Compound A: Has 2 –OH groups. - Compound B: Propane-1,3-triol (glycerol) has 3 –OH groups. - Compound C: Phenol has 1 –OH group. 4. **Count the –OH Groups**: - Compound A: 2 –OH groups - Compound B: 3 –OH groups - Compound C: 1 –OH group 5. **Determine the Hydrogen Bonding**: - More –OH groups mean more hydrogen bonding. - Compound B (Propane-1,3-triol) with 3 –OH groups will have the most hydrogen bonding. 6. **Conclusion**: - Since Compound B has the highest number of –OH groups, it will be the most viscous among the options provided. ### Final Answer: - The most viscous compound is **Compound B (Propane-1,3-triol)**.

To determine which compound is the most viscous among the given options, we need to consider the concept of viscosity and its relationship with hydrogen bonding in alcohols and phenols. ### Step-by-Step Solution: 1. **Understand Viscosity**: - Viscosity is a measure of a fluid's resistance to flow. Higher viscosity means the fluid is thicker and flows less easily. 2. **Identify Factors Affecting Viscosity**: ...
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