The charges on the colloidal CdS sol
Question:

The charges on the colloidal $\mathrm{CdS}$ sol and $\mathrm{TiO}_{2}$ sol are, respectively :

  1. positive and positive

  2. positive and negative

  3. negative and negative

  4. negative and positive


Correct Option: , 4

Solution:

CdS sol $\rightarrow-$ ve sol

$\mathrm{TiO}_{2}$ sol $\rightarrow+$ ve sol

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