| Answer | Crossword Clue |
|---|---|
| ACID | This turns litmus red |
| ACID | It turns litmus red |
| ACID | It turns litmus paper red |
| ALKALI | It turns red litmus paper blue |
| litmus | blue coloring matter obtained from certain lichens, esp. Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator |
| BASE | It turns litmus blue |
| ALKALI | It turns litmus blue |
| ALKALI | It turns litmus paper blue |
| BASE | It turns litmus paper blue |
