green when viewed through a blue glass
blue when viewed through a blue glass
orange -red when viewed through a blue glass
brick-red when viewed through a blue-glass
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The correct answer is (A)green when viewed through a blue glass.
Reference essential textbook
1 Calcium compound gives a brick red colour in a non luminous flame,
2 ,but appears green when viewed through a blue glass
The blue glass acts as a filter that absorbs the longer wavelengths (red/orange) of the calcium emission spectrum and allows only the green wavelengths to pass through, helping to confirm the presence of calcium and distinguish it from other metals like sodium.
In a flame test, calcium produces a brick-red flame.
However, to distinguish this color more clearly (especially when other metals like sodium may interfere), a blue cobalt glass is sometimes used.
When viewed through blue glass, the brick-red color can still be seen, but it helps filter out yellow-orange flames (like those from sodium), making calcium's flame more distinct.
So, Calcium = Brick-red (even through blue glass).
.....in summary, the answer still remains D and not A
-courtesy of ChatGPT.
Calcium salts produce an orange flame. However, the color may be muted, so it can be hard to distinguish between the yellow of sodium or gold of iron. The usual lab sample is calcium carbonate. If the specimen is not contaminated with sodium, you should get a nice orange color.
Then mixing of colors orange+blue=green
The answer is legit "A"
The correct answer is *D) brick red when viewed through a blue glass*.
*Explanation:*
1. *Calcium* emits a *brick red* or *orange-red* flame when subjected to a flame test.
2. When viewed through a *blue glass (cobalt glass)*, the yellow/orange hues are filtered out, but the red color remains visible, still appearing *brick red*.
*Why Option D is Correct:*
- The *brick red* color is characteristic of calcium's emission spectrum.
Ai overview
just read on the test for calcium ion , but before then let me bring to ur notice that calcium gives a brick red colouration when burnt i.e flame test, and green when viewed through blue glass. Thanks
