Question

Calcium compound gives which colour in the flame test?
(A) Lilac
(B) Blue
(C) Brick red
(D) Golden yellow.

Answer 1

Hint: Flame test is an analytical technique used in chemistry in order to determine certain metals and metalloids which are present in a chemical compound. Not all metals will produce colour in the flame test. Certain elements do not show any colour.

Complete answer:
We can detect the ions present in a compound by different methods. We should be able to identify the ions correctly. Among that one of the methods is the flame test. Flame test is the qualitative procedure which is used in chemistry to identify the elements, ions present in certain compounds. This can be done by observing the characteristics emission spectrum produced from the flame. In the flame test various ions will be producing various colours in the flame.
The procedure of the flame test is very simple. All we have to do is simply introduce the sample of the element into a non-luminous flame. The sample when introduced in the flame will evaporate and thus it will produce a certain colour. By observing the colour we can determine the compound. Calcium when introduced into the flame, it will produce brick red colour.

Therefore, the correct answer is option C) Brick red.

Additional information:
Different compounds will produce different colours in the flame test. Let us see some examples:

ELEMENT	FLAME COLOUR
Arsenic	Blue
Barium	Apple green
Cerium	Yellow
Copper	Bluish green
Mercury	Red
Lithium	Crimson red
Potassium	Lilac
strontium	Crimson to scarlet red

Note: - Flame test is the simplest way to detect elements. It requires only certain basic equipment to carry out experiments in the laboratory.
- This test will be difficult to detect the elements which are present in a very small concentration.
- Certain elements like palladium, platinum, silver and gold do not produce any colour during the flame test, but it can produce spark.