Why is gas a chemical reaction not detectable by sight? Explain?
my answer is because the atoms or molecules of matter in the gaseous state move freely among each other, and are, in most instances, packed more loosely than the molecules of the same substance in the solid or liquid state. Pls. correct me
The question isn't exactly clear to me; however, your answer seems as good as any.
Your answer is partially correct, but let me provide a more detailed explanation.
Gas is a state of matter where the atoms or molecules are not closely packed, but rather move around freely and independently. In this state, the atoms or molecules have more kinetic energy than in a solid or liquid state. This extra energy allows them to move more rapidly and be further apart from each other.
Because the gas molecules are so spread out and moving rapidly, they do not interact with light in the same way as solids or liquids do. When light interacts with matter, it can be absorbed, transmitted, or reflected depending on the properties of that matter.
In the case of gases, the individual molecules are typically much smaller and less dense compared to solids or liquids. This means that when light encounters a gas, there are fewer molecules for the light to interact with. As a result, the light passes through the gas without being significantly absorbed, transmitted, or reflected.
Since gases do not absorb, transmit, or reflect light in the visible spectrum, they are generally not detectable by sight. However, it is worth noting that some gases may have distinct colors or may exhibit other visible characteristics when mixed with certain substances or under specific conditions. For example, chlorine gas has a yellow-green color, and nitrogen dioxide gas has a reddish-brown color. But in general, the molecules in a gas state are not visually detectable by sight alone.