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JEE Main & Advanced Sample Paper JEE Main Sample Paper-6

  • question_answer
    Directions: Question No. 49 are Assertion- Reaction type. Each of these contains tow statements Statement I (Assertion), Statement II (Reason). Each of these questions also has four alternative choices, only on of which is correct. You have to select the correct choices from the codes a, b, c and d given below:   
    Statement I: Colloidal solutions are stable but the colloidal particles do not settle down.
    Statement II: Brownian movement counters the force of gravity actively on colloidal particles.

    A)  Statement I is true; Statement B is true; Statement B is not a correct explanation for Statement I,

    B)  Statement I is true; Statement II is false.

    C)  Statement I is false; Statement II is true.

    D)  Statement I is true; Statement II is true; Statements is the correct explanation for Statement I.

    Correct Answer: D

    Solution :

    The Brownian movement has been explained due to the unbalanced bombardment of the particles by the molecules of the dispersion medium. The Brownian movement has a stirring effect which does not permit the particles to settle and is responsible for the stability of solution.


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