| Q.7 | You need to use 250 µl of a chemical reagent for an experiment from a stock solution of 100 mg/ml. You find that the stock solution is over and for making a fresh stock you have only 50 mg of the chemical reagent powder. What do you do? | |
| Ans | 1. Stop the experiment as you do not have enough reagent to make the fresh stock. | |
| 2. Dissolve 50 mg in 250 µl of the solvent and use 250 µl for your experiment. | ||
| 3. Dissolve 50 mg in 1000 µl of the solvent and use 250 µl for your experiment. | ||
| 4. Dissolve 25 mg in 250 µl of the solvent and use 250 µl for your experiment. |
Correct Ans Provided: 4
