Question

1. what is wrong with the windowpane on the right side?

options:

• it is dirty
• the screen is missing
• the argon gas has leaked out
• the seal is lost
• the uv (ultraviolet) coating is defective

Explanation:

Looking at the right windowpane, we can see that there is condensation or fogging between the panes, which typically happens when the seal (that keeps the insulating gas and separates the panes) is lost. A dirty window would be a surface - level dirt, the screen being missing is about the screen (not the pane itself), argon gas leakage is hard to visually confirm like this, and UV coating defect isn't visible as such fogging. So the issue is the seal is lost.

Answer:

D. The seal is lost