MCQOPTIONS
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| 1. |
The critical value of zeta potential (in milli volts) for a stable colloid (except gold sol) is: |
| A. | from 20 to 50 |
| B. | from 50 to 100 |
| C. | less than 20 |
| D. | mor than 100 |
| Answer» B. from 50 to 100 | |