Final answer:
The sample with the highest boiling point has the highest viscosity. The Celsius scale's reference point is the freezing point of water. The order of boiling points from lowest to highest among stated substances is Ar < HCl < CsCl < HF.
option b is the correct
Step-by-step explanation:
To determine which sample has the highest viscosity, we need to consider the intermolecular forces in the liquids. Generally, the stronger these forces, the higher the viscosity of the liquid. As boiling point is a measure of how much energy is needed to break these intermolecular forces, a liquid with a higher boiling point will typically have stronger intermolecular forces and, hence, a higher viscosity. Therefore, the sample with the highest boiling point is the one with the highest viscosity.
Referring to the Celsius scale, the correct reference point is the freezing point of water. Therefore, the answer to the question about the Celsius scale is c. the freezing point of water.
For the question regarding identifying chemicals in beakers based on boiling points, it is essential to know the boiling points of the substances provided (HF, Ar, CsCl, and HCl). Argon, being a noble gas, will have the lowest boiling point. HCl is a gas at room temperature, so it will have a higher boiling point than Ar, but lower than CsCl and HF.
Cesium Chloride is a salt with a high boiling point, and Hydrogen Fluoride (HF), being a polar molecule with hydrogen bonding, will have the highest boiling point among the given substances.