Question

how is stained glass made?
a. adding metallic oxides to sand and ash or lime, then infusing at high temperatures
b. adding metallic oxides to salt, then infusing over time at low temperatures
c. adding metallic oxides to sulfur, then infusing at high temperatures
d. adding metallic oxides to sulfur, then infusing at low temperatures

please select the best answer from the choices provided

a
b
c
d

Explanation:

Analyze the chemical composition of glass

Glass is primarily made by fusing silica (sand) with an alkaline flux like potash (ash) or soda, and a stabilizer like lime (calcium oxide) at very high temperatures.

Identify the coloring agent and process

Stained glass is colored by adding metallic oxides (such as copper, cobalt, or iron) to the basic mixture of sand and ash or lime, and then fusing them together at high temperatures.

Evaluate the given options

Option (a) correctly identifies the ingredients (sand and ash or lime), the addition of metallic oxides, and the high-temperature fusion process.

Answer:

• a. adding metallic oxides to sand and ash or lime, then infusing at high temperatures (Correct answer)
• b. adding metallic oxides to salt, then infusing over time at low temperatures
• c. adding metallic oxides to sulfur, then infusing at high temperatures
• d. adding metallic oxides to sulfur, then infusing at low temperatures