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11th Class Chemistry Chapter 9 MCQs with Answers

11th Class Chemistry Chapter 9 MCQs

Dive into Solutions MCQs focusing on solubility, colligative properties, and concentration units. These Chapter 9 quizzes simplify the study of solutions for 11th Class Chemistry students preparing for exams.

What is the definition of a solution?
a) A homogeneous mixture of two or more substances
b) A heterogeneous mixture of two or more substances
c) A pure substance made up of only one type of atom
d) A pure substance made up of only one type of molecule

Answer
a) A homogeneous mixture of two or more substances

Which of the following is an example of a solid-solid solution?
a) Sugar dissolved in water
b) Salt dissolved in water
c) Alloys like brass and bronze
d) Carbon dioxide dissolved in water

Answer
c) Alloys like brass and bronze

What is the solvent in an aqueous solution of salt (NaCl) dissolved in water?
a) Water
b) Salt (NaCl)
c) Hydrogen
d) Oxygen

Answer
a) Water

The component present in a smaller amount in a solution is called the:
a) Solvent
b) Solute
c) Solution
d) Solubility

Answer
b) Solute

Which of the following is an example of a gas-gas solution?
a) Oxygen gas dissolved in water
b) Carbon dioxide gas dissolved in water
c) Air (oxygen and nitrogen) in the atmosphere
d) Sugar dissolved in water

Answer
c) Air (oxygen and nitrogen) in the atmosphere

The process of dissolving a solid, liquid, or gas in a liquid solvent to form a homogeneous mixture is called:
a) Precipitation
b) Filtration
c) Solution
d) Solubility

Answer
c) Solution

Which of the following factors does not affect the solubility of a solute in a solvent?
a) Temperature
b) Pressure
c) Particle size of the solute
d) Polarity of the solute

Answer
d) Polarity of the solute

The maximum amount of solute that can be dissolved in a given amount of solvent at a specific temperature is called:
a) Solute
b) Solvent
c) Solubility
d) Solution

Answer
c) Solubility

The solubility of most solid solutes in water generally with an increase in temperature.
a) Increases
b) Decreases
c) Remains constant
d) Varies randomly

Answer
a) Increases

The solubility of most gases in water generally with an increase in temperature.
a) Increases
b) Decreases
c) Remains constant
d) Varies randomly

Answer
b) Decreases

What does it mean if a solute is said to be “insoluble” in a solvent?
a) The solute cannot be dissolved in the solvent
b) The solute can be partially dissolved in the solvent
c) The solute can be completely dissolved in the solvent
d) The solute can only be dissolved in hot solvents

Answer
a) The solute cannot be dissolved in the solvent

Which of the following is an example of a solid-liquid solution?
a) Oxygen gas dissolved in water
b) Carbon dioxide gas dissolved in water
c) Salt dissolved in water
d) Sugar dissolved in water

Answer
c) Salt dissolved in water

Which of the following is an example of a liquid-liquid solution?
a) Sugar dissolved in water
b) Salt dissolved in water
c) Ethanol dissolved in water
d) Oxygen gas dissolved in water

Answer
c) Ethanol dissolved in water

The concentration of a solution is defined as the:
a) Amount of solvent in the solution
b) Amount of solute in the solution
c) Ratio of solute to solvent in the solution
d) Amount of solution in the solvent

Answer
b) Amount of solute in the solution

Which of the following statements is true about concentrated solutions?
a) They contain a large amount of solvent and a small amount of solute
b) They contain a small amount of solvent and a large amount of solute
c) They contain an equal amount of solvent and solute
d) They are always in a gaseous state

Answer
b) They contain a small amount of solvent and a large amount of solute

Which of the following is an example of a dilute solution?
a) A cup of strong coffee with little sugar
b) A cup of weak coffee with lots of sugar
c) A cup of pure water
d) A cup of black coffee with no sugar

Answer
c) A cup of pure water

The molarity (M) of a solution is defined as the number of moles of solute:
a) Dissolved in 1 liter of solvent
b) Dissolved in 1 liter of solution
c) Dissolved in 1 kilogram of solvent
d) Dissolved in 1 kilogram of solution
junkie-toggle title=”Answer” state=”closed”] b) Dissolved in 1 liter of solution [/junkie-toggle]

The symbol “mol/L” is used to represent the unit of:
a) Molarity
b) Molality
c) Mass percent
d) Mole fraction

Answer
a) Molarity

Which of the following is the correct formula for calculating molarity (M) of a solution?
a) M = moles of solute / liters of solution
b) M = liters of solution / moles of solute
c) M = moles of solute * liters of solution
d) M = liters of solution * moles of solute

Answer
a) M = moles of solute / liters of solution

Which of the following is the correct formula for calculating molality (m) of a solution?
a) m = moles of solute / liters of solvent
b) m = moles of solute * kilograms of solvent
c) m = moles of solute / kilograms of solvent
d) m = moles of solute * liters of solvent

Answer
c) m = moles of solute / kilograms of solvent

Which of the following statements is true about molality (m) of a solution?
a) It depends on temperature
b) It depends on pressure
c) It is independent of temperature
d) It is independent of pressure

Answer
d) It is independent of pressure

The colligative properties of a solution depend on the:
a) Nature of the solute particles
b) Nature of the solvent particles
c) Number of solute particles
d) Volume of the solvent

Answer
c) Number of solute particles

Which of the following is a colligative property of a solution?
a) Boiling point elevation
b) Density of the solvent
c) Refractive index of the solvent
d) Melting point of the solute

Answer
a) Boiling point elevation

The process of adding a solute to a solvent in order to lower the freezing point of the solvent is called:
a) Freezing point elevation
b) Boiling point elevation
c) Freezing point depression
d) Boiling point depression

Answer
c) Freezing point depression

Which of the following is not a colligative property of a solution?
a) Boiling point elevation
b) Vapor pressure lowering
c) Osmotic pressure
d) Density of the solution

Answer
d) Density of the solution

What happens to the boiling point of a solution when a non-volatile solute is added to a solvent?
a) It increases
b) It decreases
c) It remains unchanged
d) It depends on the nature of the solvent

Answer
a) It increases

The presence of solute particles in a solution the vapor pressure of the solvent.
a) Increases
b) Decreases
c) Does not affect
d) Depends on the nature of the solute

Answer
b) Decreases

Which of the following is a colligative property that is responsible for the process of osmosis?
a) Boiling point elevation
b) Freezing point depression
c) Vapor pressure lowering
d) Osmotic pressure

Answer
d) Osmotic pressure

Osmosis is the movement of solvent molecules from an area of ____ solute concentration to an area of____solute concentration through a semipermeable membrane.
a) Lower; higher
b) Higher; lower
c) Higher; higher
d) Lower; lower

Answer
b) Higher; lower

Which of the following is a characteristic of a semipermeable membrane?
a) It allows only solute particles to pass through
b) It allows only solvent particles to pass through
c) It allows both solute and solvent particles to pass through
d) It does not allow any particles to pass through

Answer
b) It allows only solvent particles to pass through

What is the effect of increasing the concentration of solute particles on the rate of osmosis?
a) It increases the rate of osmosis
b) It decreases the rate of osmosis
c) It does not affect the rate of osmosis
d) It stops osmosis

Answer
b) It decreases the rate of osmosis

The process of osmosis is responsible for the movement of water in:
a) Plant roots
b) Plant leaves
c) Animal cells
d) All of the above

Answer
d) All of the above

The osmotic pressure of a solution depends on the:
a) Nature of the solute particles
b) Nature of the solvent particles
c) Number of solute particles
d) Number of solvent particles

Answer
c) Number of solute particles

Which of the following statements is true about a hypertonic solution?
a) It has a lower concentration of solute particles than the cell
b) It has a higher concentration of solute particles than the cell
c) It has the same concentration of solute particles as the cell
d) It is an isotonic solution

Answer
b) It has a higher concentration of solute particles than the cell

Which of the following statements is true about a hypotonic solution?
a) It has a lower concentration of solute particles than the cell
b) It has a higher concentration of solute particles than the cell
c) It has the same concentration of solute particles as the cell
d) It is an isotonic solution

Answer
a) It has a lower concentration of solute particles than the cell

Which of the following statements is true about an isotonic solution?
a) It has a lower concentration of solute particles than the cell
b) It has a higher concentration of solute particles than the cell
c) It has the same concentration of solute particles as the cell
d) It is a hypotonic solution

Answer
c) It has the same concentration of solute particles as the cell

What is the condition called when the osmotic pressure outside a cell is higher than the osmotic pressure inside the cell, causing the cell to shrink?
a) Crenation
b) Hemolysis
c) Plasmolysis
d) Turgor pressure

Answer
a) Crenation

Which of the following is a common example of crenation?
a) A red blood cell in a hypotonic solution
b) A plant cell in a hypertonic solution
c) A plant cell in a hypotonic solution
d) A red blood cell in a hypertonic solution

Answer
d) A red blood cell in a hypertonic solution

Which of the following is a common example of plasmolysis?
a) A red blood cell in a hypertonic solution
b) A plant cell in a hypertonic solution
c) A red blood cell in a hypotonic solution
d) A plant cell in a hypotonic solution

Answer
b) A plant cell in a hypertonic solution

Which of the following is a common example of hemolysis?
a) A red blood cell in a hypertonic solution
b) A plant cell in a hypertonic solution
c) A red blood cell in a hypotonic solution
d) A plant cell in a hypotonic solution

Answer
c) A red blood cell in a hypotonic solution

The process of separating the components of a solution based on their boiling points is called:
a) Filtration
b) Distillation
c) Crystallization
d) Chromatography

Answer
b) Distillation

Which of the following is a common application of distillation?
a) Purification of drinking water
b) Separation of salt and sugar in a solution
c) Separation of different gases in air
d) Filtration of solid particles from a liquid solution

Answer
c) Separation of different gases in air

The process of separating a solute from a solution by cooling the solution and forming crystals is called:
a) Filtration
b) Distillation
c) Crystallization
d) Chromatography

Answer
c) Crystallization

Which of the following is a common application of crystallization?
a) Purification of drinking water
b) Separation of salt and sugar in a solution
c) Separation of different gases in air
d) Filtration of solid particles from a liquid solution

Answer
b) Separation of salt and sugar in a solution

The process of separating the components of a solution based on their ability to move through a medium is called:
a) Filtration
b) Distillation
c) Crystallization
d) Chromatography

Answer
d) Chromatography

Which of the following is a common application of chromatography?
a) Purification of drinking water
b) Separation of salt and sugar in a solution
c) Separation of different gases in air
d) Analysis of plant pigments in biology

Answer
d) Analysis of plant pigments in biology

What is the role of the mobile phase in chromatography?
a) It is the medium through which the sample moves
b) It is the medium that absorbs the sample
c) It is the medium that separates the components of the sample
d) It is the medium that forms crystals from the sample

Answer
a) It is the medium through which the sample moves

What is the role of the stationary phase in chromatography?
a) It is the medium through which the sample moves
b) It is the medium that absorbs the sample
c) It is the medium that separates the components of the sample
d) It is the medium that forms crystals from the sample

Answer
c) It is the medium that separates the components of the sample

Which of the following is a common example of paper chromatography?
a) Separating the components of ink
b) Separating the components of air
c) Separating the components of saltwater
d) Separating the components of gasoline

Answer
a) Separating the components of ink

Which of the following is a common example of gas chromatography?
a) Separating the components of ink
b) Separating the components of air
c) Separating the components of saltwater
d) Separating the components of gasoline

Answer
b) Separating the components of air

Which of the following is a common example of liquid chromatography?
a) Separating the components of ink
b) Separating the components of air
c) Separating the components of saltwater
d) Separating the components of gasoline

Answer
d) Separating the components of gasoline

The separation technique used to separate the colors in a mixture based on their solubility is called:
a) Filtration
b) Distillation
c) Crystallization
d) Chromatography

Answer
d) Chromatography

Which of the following statements is true about solubility?
a) It is the ability of a solute to dissolve in a solvent
b) It is the ability of a solvent to dissolve in a solute
c) It is the ability of a solute to crystallize from a solution
d) It is the ability of a solvent to evaporate from a solution

Answer
a) It is the ability of a solute to dissolve in a solvent

The process of adding more solute to a saturated solution at a given temperature is called:
a) Precipitation
b) Filtration
c) Crystallization
d) Supersaturation

Answer
d) Supersaturation

Which of the following statements is true about supersaturated solutions?
a) They contain less solute than a saturated solution at the same temperature
b) They contain more solute than a saturated solution at the same temperature
c) They contain the same amount of solute as a saturated solution at the same temperature
d) They are always unstable and form precipitates immediately

Answer
b) They contain more solute than a saturated solution at the same temperature

The process of forming solid crystals from a supersaturated solution is called:
a) Precipitation
b) Filtration
c) Crystallization
d) Supersaturation

Answer
a) Precipitation

Which of the following statements is true about precipitates?
a) They are formed in unsaturated solutions
b) They are formed in saturated solutions
c) They are formed in supersaturated solutions
d) They are formed in concentrated solutions

Answer
b) They are formed in saturated solutions

The process of removing solid particles from a liquid by passing the liquid through a filter is called:
a) Precipitation
b) Filtration
c) Crystallization
d) Supersaturation

Answer
b) Filtration

Which of the following statements is true about filtration?
a) It is a method used to separate components of a solution based on their boiling points
b) It is a method used to separate components of a solution based on their solubility
c) It is a method used to remove solid particles from a liquid solution
d) It is a method used to remove gas particles from a liquid solution

Answer
c) It is a method used to remove solid particles from a liquid solution

The process of separating a mixture into its individual components by passing it through a column containing an adsorbent material is called:
a) Precipitation
b) Filtration
c) Crystallization
d) Chromatography

Answer
d) Chromatography

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