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(a) True solutions do not exhibit tyndal...

(a) True solutions do not exhibit tyndall effect.
(r) in true solutions, size of solute particles is much smaller than the wavelength of light used.

A

IF both (A) and (r) are correct and (r) is the correct explanation for (a).

B

If both (a) and (r) are correct but (r) is not the correct explanation for (a).

C

IF (a) is correct but (r) is incorrect.

D

If (a) is incorrect but (r) is correct.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements given in the question, we will break down each part step by step. ### Step 1: Understanding True Solutions A true solution is a homogeneous mixture where the solute particles are completely dissolved in the solvent. The particles in a true solution are at the molecular or ionic level. ### Step 2: Tyndall Effect The Tyndall effect is the scattering of light by colloidal particles. It is observed when light passes through a colloidal solution, making the path of the light visible. ### Step 3: Statement Analysis - **Statement (a)**: "True solutions do not exhibit Tyndall effect." - This statement is **true**. True solutions do not scatter light because the size of the solute particles is much smaller than the wavelength of visible light. Therefore, they do not exhibit the Tyndall effect. - **Statement (r)**: "In true solutions, the size of solute particles is much smaller than the wavelength of light used." - This statement is also **true**. In true solutions, the solute particles are typically less than 1 nanometer in size, which is significantly smaller than the wavelength of visible light (approximately 400-700 nanometers). ### Step 4: Relationship Between Statements Since both statements are true, we need to determine if statement (a) is a correct explanation of statement (r). The reason true solutions do not exhibit the Tyndall effect is indeed because the solute particles are much smaller than the wavelength of light. ### Conclusion Both statements are true, and statement (a) correctly explains statement (r). ### Final Answer Both statements (a) and (r) are true, and (a) is the correct explanation of (r). ---
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Knowledge Check

  • A true solution is

    A
    Clear and transparent
    B
    turbid and translucent
    C
    milky and opaque
    D
    none of the above

  • A true solution is

    A
    clear and transparent
    B
    turbid and translucent
    C
    milky and opaque
    D
    none of the above

  • In solution ,the molecular size of particles is

    A
    less than `10^(-9)` m
    B
    equal to `10^(-9)` m
    C
    more than `10^(-9)` m
    D
    equalto `10^(-9)` cm

    • Similar Questions

    Explore conceptually related problems

    Tyndall effect in colloidal solution is due to

    Tyndall effect in colloidal solution is due to:

    The Tyndall effect is observed only when following conditions are satisfied: (A) the diameter of the dispersed particles is much smaller than the wavelength of the light used. (B) the diameter of the dispersed particle is not much smaller than the wavelength of the light use (C) the refreactive indices of the dispersed phase and dispersion medium are almost similar in magnitude (D) the refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

    The Tyndall effect is observed only when the following conditions are satisfied : (i) The diameter of the dispersed particles is much smaller than the wavelength of the light used. (ii) The diameter of the dispersed particles is not much smaller than the wavelengthof hte light used. (iii) The refractive indices of the dispersed phase and dispersino medium are almost similar in magnitude. (iv) The refracticve indicase of the dispersed phase and dispersion medium differ greatly in magnitude

    Storng Tyndall effect is observed only when (i) the refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude (ii) the diameter of the dispersed particles is biggest than the wavelength of the light used (iii) the refractive indices of the dispersed phase and the dispersion medium are similar (iv) the diameter of the dispersed particles is not much smaller than the wavelength of the light used.

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