The reference electrodes in combination electrodes are protected against light using which of the following?
A. Emerald green glass
B. Ruby red glass
C. Sapphire blue glass
D. Pearl white glass
Answer:B
The reference electrodes in combination electrodes are protected against light using which of the following?
A. Emerald green glass B. Ruby red glass C. Sapphire blue glass D. Pearl white glass
Explanation: The reference electrodes in combination electrodes are protected against light using ruby red glass. The ruby red glass absorbs light.