Question

ASSERTION: When a flash of light is passed through colloidal solution its path get illuminated. REASON: True solutions do not show tyndall effect.​

Answer 1

Answer:

When light is passed through a true solution, the dissolved particles are too small to deflect the light. ... Colloid particles are larger than water and large enough to show Tyndall effect. Hence Both Assertion and Reason are correct and Reason is the correct explanation for assertion.

Answer 2

ASSERTION: When a flash of light is passed through colloidal solution its path get illuminated.

REASON: True solutions do not show tyndall effect.

Assertion and Reason are correct but Reason is not the correct explanation.

• When light rays pàss through a colloidal solution they experience scattering and their path gets illuminated.

• This phenomenon is called Tyndall effect. This occurs because the particle size in colloidal solutions is comparable to the wavelength of light.

• However, true solutions do not show tyndall effect because the particle size is much smaller than the wavelength of light.

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