Which of the following statements is incorrect?
- ALyophilic sols are reversible.
- BLyophilic sols are more stable than lyophobic sols.
- CLyophobic sols require stabilizing agents for their preservation.
- DLyophobic sols can be formed by direct mixing of dispersed phase and dispersion medium.
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DifficultMHT CET 2007
View SolutionThe size of colloidal particles is . . .
Medium
View SolutionAssertion : $Fe^{3+}$ can be used for coagulation of $As_2S_3$ sol.
Reason : $Fe^{3+}$ reacts with $As_2S_3$ to give $Fe_2S_3$.
Reason : $Fe^{3+}$ reacts with $As_2S_3$ to give $Fe_2S_3$.
MediumAIIMS 2006
View Solution$A$ is a protecting colloid. The following data is obtained for preventing the coagulation of $10 \text{ mL}$ of gold sol to which $1 \text{ mL}$ of $10\% \text{ NaCl}$ is added. What is the gold number of $A$?
$1$. Expt. No. $2$. Wt (in mg) of $A$ added to gold sol $3$. Coagulation $1$ $40$ Prevented $2$ $35$ Prevented $3$ $25$ Not prevented $4$ $32$ Not prevented $5$ $33$ Prevented
| $1$. Expt. No. | $2$. Wt (in mg) of $A$ added to gold sol | $3$. Coagulation |
| $1$ | $40$ | Prevented |
| $2$ | $35$ | Prevented |
| $3$ | $25$ | Not prevented |
| $4$ | $32$ | Not prevented |
| $5$ | $33$ | Prevented |
Which of the following will have the highest coagulating power for $As_2S_3$ colloid?
Medium
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