• On coming in contact with the respective electrode, the colloidal substance loses its charge.
• The freshly cut surface darkens on exposure to air.
• These alloys obtain an oxide layer immediately ( up ) on contact with air.
• The dissolved gas reacts instantly with OH - on contact .
• The process by which ethylene oxide and water react in contact with ( or when contacting ) an ion-exchange resin is discussed in the following section.
• Meshing does not result on contact , unless the jaws are aligned.