Pharmacy Practice MCQ » PHARMACAREERS

Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject physical pharmaceutics. Read following article for your reference.

Solubility Of Gases In Liquids, Binary Solutions, Roult’s Law » PHARMACAREERS

What does Raoult’s Law state?
- A) The vapor pressure of a solvent is equal to the vapor pressure of the solute.
- B) The vapor pressure of a solvent above a solution is equal to the vapor pressure of the pure solvent multiplied by its mole fraction in the solution.
- C) The solubility of a gas in a liquid is directly proportional to the pressure of the gas.
- D) The solubility of a gas in a liquid is inversely proportional to the temperature.
Which of the following is an ideal solution according to Raoult’s Law?
- A) A solution where the solute and solvent have different molecular sizes.
- B) A solution where the solute and solvent have similar molecular sizes and interactions.
- C) A solution where the solute is a gas and the solvent is a liquid.
- D) A solution where the solute is a solid and the solvent is a liquid.
In Raoult’s Law, what does ( \chi_{\text{solvent}} ) represent?
- A) Mole fraction of the solute.
- B) Mole fraction of the solvent.
- C) Vapor pressure of the solute.
- D) Vapor pressure of the solvent.
What happens to the vapor pressure of a solution when a non-volatile solute is added?
- A) It increases.
- B) It decreases.
- C) It remains the same.
- D) It fluctuates.
Which law is used to describe the solubility of gases in liquids?
- A) Raoult’s Law
- B) Henry’s Law
- C) Dalton’s Law
- D) Boyle’s Law
According to Raoult’s Law, what is the relationship between the vapor pressure of a solution and the mole fraction of the solvent?
- A) Directly proportional
- B) Inversely proportional
- C) No relationship
- D) Exponentially proportional
What is the effect of temperature on the solubility of gases in liquids?
- A) Solubility increases with temperature.
- B) Solubility decreases with temperature.
- C) Solubility remains constant.
- D) Solubility first increases then decreases.
Which of the following is NOT an assumption of Raoult’s Law?
- A) The solution is ideal.
- B) The solute is non-volatile.
- C) The interactions between solute and solvent are the same as those between solvent molecules.
- D) The solute has a significant vapor pressure.
What is the partial vapor pressure of a component in an ideal solution according to Raoult’s Law?
- A) The product of the mole fraction of the component and the total vapor pressure.
- B) The product of the mole fraction of the component and the vapor pressure of the pure component.
- C) The sum of the mole fractions of all components.
- D) The difference between the vapor pressures of the pure components.
Which of the following best describes an ideal solution?
- A) A solution that follows Raoult’s Law at all concentrations.
- B) A solution that follows Henry’s Law at all concentrations.
- C) A solution that shows positive deviation from Raoult’s Law.
- D) A solution that shows negative deviation from Raoult’s Law.
What is the main factor affecting the solubility of gases in liquids?
- A) Temperature
- B) Pressure
- C) Nature of the gas
- D) All of the above
In a binary solution, what does the term ‘binary’ refer to?
- A) Two solvents
- B) Two solutes
- C) One solute and one solvent
- D) Two gases
What is the significance of Raoult’s Law in physical pharmaceutics?
- A) It helps in determining the solubility of drugs.
- B) It helps in predicting the stability of drug formulations.
- C) It helps in understanding the vapor pressure of solutions.
- D) All of the above
Which of the following is a limitation of Raoult’s Law?
- A) It applies only to ideal solutions.
- B) It applies to all types of solutions.
- C) It does not consider the interactions between solute and solvent.
- D) It is only applicable at high temperatures.
What is the effect of adding a volatile solute to a solvent on the vapor pressure of the solution?
- A) It increases the vapor pressure.
- B) It decreases the vapor pressure.
- C) It has no effect on the vapor pressure.
- D) It depends on the nature of the solute.
What is the role of mole fraction in Raoult’s Law?
- A) It determines the concentration of the solute.
- B) It determines the concentration of the solvent.
- C) It determines the partial vapor pressure of each component.
- D) It determines the total vapor pressure of the solution.
Which of the following is true for an ideal solution?
- A) The enthalpy of mixing is zero.
- B) The volume of mixing is zero.
- C) The solution follows Raoult’s Law.
- D) All of the above
What is the effect of pressure on the solubility of gases in liquids?
- A) Solubility increases with pressure.
- B) Solubility decreases with pressure.
- C) Solubility remains constant.
- D) Solubility first increases then decreases.
Which of the following is an example of a binary solution?
- A) Salt in water
- B) Sugar in water
- C) Oxygen in water
- D) All of the above
What is the relationship between the vapor pressure of a solution and the vapor pressure of the pure solvent in Raoult’s Law?
- A) The vapor pressure of the solution is higher.
- B) The vapor pressure of the solution is lower.
- C) The vapor pressure of the solution is the same.
- D) The vapor pressure of the solution is independent of the pure solvent.
Which of the following factors does NOT affect the solubility of gases in liquids?
- A) Temperature
- B) Pressure
- C) Nature of the gas
- D) Color of the gas
What is the significance of the mole fraction in a solution?
- A) It indicates the proportion of solute in the solution.
- B) It indicates the proportion of solvent in the solution.
- C) It indicates the proportion of each component in the solution.
- D) It indicates the total concentration of the solution.
Which of the following statements is true about Raoult’s Law?
- A) It applies to non-ideal solutions.
- B) It applies to ideal solutions.
- C) It applies to solutions with strong solute-solvent interactions.
- D) It applies to solutions with weak solute-solvent interactions.
What is the effect of adding a non-volatile solute to a solvent on the boiling point of the solution?
- A) It increases the boiling point.
- B) It decreases the boiling point.
- C) It has no effect on the boiling point.
- D) It depends on the nature of the solute.
Which of the following is a characteristic of an ideal solution?
- A) The solution follows Raoult’s Law.
- B) The solution shows positive deviation from Raoult’s Law.
- C) The solution shows negative deviation from Raoult’s Law.
- D) The solution does not follow Raoult’s Law.

Leave a Comment Cancel reply