| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| (Sarah of the Clue Crew reports from the Jeopardy!lab.) The juice from blackberries can make ordinary construction paper into this"testing" type of scientific paper | litmus paper | $400 | DJ | CHEMISTRY | 2008-05-30 | #5475 | |
| A drop of solution placed on this paper will indicate if the solution is acidic, neutral or basic | litmus paper | $400 | DJ | CHEMISTRY | 2002-01-04 | #3995 |