Physicochemical Methods Quiz

What is the definition of specific gravity?

• The ratio of the density of a substance to that of a standard substance

• The resistance of a fluid to flow

• The ability of a solute to dissolve in a solvent

• The temperature point at which solids melt

Which instrument is used to measure specific gravity?

• Viscometer

• Pycnometer

• Refractometer

• Hardness tester

What does viscosity measure?

• The ratio of the density of a substance to that of a standard substance

• The resistance of a fluid to flow

• The ability of a solute to dissolve in a solvent

• The temperature point at which solids melt

How does temperature affect viscosity?

• Increasing temperature increases viscosity

• Decreasing temperature increases viscosity

• Temperature has no effect on viscosity

• Viscosity is only affected by pressure

What is solubility?

• The ratio of the density of a substance to that of a standard substance

• The resistance of a fluid to flow

• The ability of a solute to dissolve in a solvent

• The temperature point at which solids melt

Which factors affect solubility?

• Temperature, molecular size, and polarity

• Viscosity, pH, and melting point

• Specific gravity, refractive index, and hardness

• Loss on drying, dissolution, and disintegration

What is the pH scale used to measure?

• Specific gravity

• Viscosity

• Solubility

• Acidity and basicity

What is the melting point of a substance?

• The ratio of the density of a substance to that of a standard substance

• The resistance of a fluid to flow

• The temperature point at which solids melt

• The ability of a solute to dissolve in a solvent

What property of organic compounds is measured by polarimetry?

• Specific gravity

• Viscosity

• Optical activity

• Refractive index

What does refractive index measure?

• The ratio of the density of a substance to that of a standard substance

• The resistance of a fluid to flow

• The ability of a solute to dissolve in a solvent

• The bending of light when passing through a medium