Which statement about qs-ing the product in the bottle to avoid loss during transferring from a measuring cylinder is true?

• A. False
• B. It depends on the liquid
• C. Not recommended
• D. True

Answer: (D)

The idea behind qs-ing is to ensure every bit of product is accounted for by adding a small amount of solvent to rinse the container and bring the final volume up to the mark. This helps recover material that clings to the measuring cylinder or other vessels, so you don’t lose accuracy or potency during transfer. In practice, after pouring the main portion into the bottle, you rinse the measuring cylinder with a little solvent and add those rinsings to the bottle to reach the exact final volume. That’s why this statement is true: qs-ing is a standard step to prevent loss and to ensure the preparation is at the intended strength and volume. The other options—saying it’s false, not recommended, or depends on the liquid—don’t align with this common technique aimed at accurate transfer.