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 11
A colloidal solution is kept undisturbed for a long time. Will the particles settle down? Explain your answer.
A mixture of water and fine clay shows a visible beam of light when a torch is shone through it. What phenomenon is being observed?
A student shines a laser pointer through a glass of water and observes no visible path of light. What does this indicate about the mixture?
Describe how the Tyndall effect can be demonstrated in a laboratory setting.
Describe the role of Brownian movement in the stability of colloidal solutions.
A colloidal solution is kept undisturbed for a long time. Will the particles settle down? Explain your answer.
A mixture of water and fine clay shows a visible beam of light when a torch is shone through it. What phenomenon is being observed?
A student shines a laser pointer through a glass of water and observes no visible path of light. What does this indicate about the mixture?
Brownian movement is caused by: (1) Gravitational force (2) Collision with molecules of the dispersion medium (3) Magnetic field (4) Electric field
Brownian movement is more pronounced at: (1) Higher temperature (2) Lower temperature (3) Neutral temperature (4) Temperature has no effect
The intensity of the Tyndall effect depends on: (1) Wavelength of light (2) Size of colloidal particles (3) Concentration of colloidal particles (4) All of the above
Which of the following best describes the Tyndall effect? (1) Scattering of light by particles in a colloid (2) Absorption of light by a solution (3) Reflection of light by a mirror (4) Refraction of light through glass
Fill in the blank: Brownian movement was first observed by __________ in 1827.
Fill in the blank: The Tyndall effect is not observed if the particle size is much __________ than the wavelength of light.
Fill in the blank: The Tyndall effect is observed when the diameter of dispersed particles is in the range of __________ nm to __________ nm.
The random, zigzag movement of colloidal particles in a dispersion medium is known as ___________.
True or False: Brownian movement helps prevent the settling of colloidal particles.
True or False: The Tyndall effect can be observed in true solutions.
True or False: The Tyndall effect can be used to distinguish between a colloid and a suspension.
True or False: The Tyndall effect can be used to estimate the size of colloidal particles.
