McqMate
| Q. |
Which of the following is an example of Bottom Up approach? |
| A. | attrition |
| B. | colloidal dispersion |
| C. | milling |
| D. | etching |
| Answer» B. colloidal dispersion | |
| Explanation: colloidal dispersion is an example of bottom up approach in the synthesis of nano particles. attrition, milling and etching are typical top down methods. | |
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