Ap Eapcet
Surface Chemistry
AP EAPCET 2024 - 22th May Evening Shift
MCQ+1 / -02024
' $A$ ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of $10 \% \mathrm{NaCl}$ is added. What is the gold number of ' $A$ '?
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}
.tg .tg-baqh{text-align:center;vertical-align:top}
| Expt. No. | Wt (in mg ) of $\boldsymbol{A}$ added to gold sol | \( \text { Coagulation } \) |
|---|---|---|
| 1 | 40 | Prevented |
| 2 | 35 | Prevented |
| 3 | 25 | Not prevented |
| 4 | 32 | Not prevented |
| 5 | 33 | Prevented |