Test for chlorine. A moist blue litmus paper is held over a test tube. If the test tube contains chlorine,which is acidic,the litmus paper will turn red | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 3840 px × 5760 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |