Tyndall Effect and Brownian Movement
Chemistry ⇒ Solutions and Colloids
Tyndall Effect and Brownian Movement starts at 10 and continues till grade 12.
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See sample questions for grade 10
A student shines a beam of light through a glass of milk and observes the path of light. What phenomenon is being demonstrated?
Describe how the Tyndall effect helps in distinguishing between a colloid and a suspension.
Describe how you would demonstrate the Tyndall effect in a laboratory setting.
Describe the effect of increasing temperature on Brownian movement.
Describe the role of Brownian movement in the stability of colloids.
Explain why Brownian movement becomes less significant as the size of colloidal particles increases.
Explain why the Tyndall effect is not observed in a solution of copper sulphate.
A student shines a beam of light through a glass of milk and observes the path of light. What phenomenon is being demonstrated?
The Tyndall effect is used in which of the following applications?
(1) Detecting colloidal impurities in water
(2) Separating mixtures
(3) Measuring temperature
(4) Determining pH
Which of the following factors does NOT affect Brownian movement?
(1) Temperature
(2) Size of particles
(3) Color of particles
(4) Viscosity of medium
Which of the following is an example of a system where the Tyndall effect can be observed?
(1) Clear water
(2) Sugar solution
(3) Fog
(4) Alcohol solution
Which of the following is NOT a characteristic of Brownian movement?
(1) It is caused by collisions with molecules of the dispersion medium
(2) It is a regular, straight-line motion
(3) It is observed in colloidal solutions
(4) It helps prevent the settling of colloidal particles
Fill in the blank: Brownian movement is caused by the __________ of colloidal particles with molecules of the dispersion medium.
Fill in the blank: Brownian movement was first observed by __________ in 1827.
Fill in the blank: The Tyndall effect is more pronounced when the difference in the refractive indices of the dispersed phase and the dispersion medium is __________.
Fill in the blank: The Tyndall effect is named after the scientist __________.
State whether the following statement is true or false: Brownian movement can be observed with the naked eye in all colloidal solutions.
State whether the following statement is true or false: Brownian movement is a result of gravitational force acting on colloidal particles.
State whether the following statement is true or false: The intensity of the Tyndall effect increases with the size of the colloidal particles.
State whether the following statement is true or false: The Tyndall effect is used in ultramicroscopy to detect colloidal particles.
