Question

Match the flame colours of the alkaline earth metal salts in the Bunsen burner.

List I	List II
A. Calcium	p. Brick Red
B. Strontium	q. Apple Green
C. Barium	r. Crimson

A. A-p, B-r, C-q
B. A-r, B-p, C-q
C. A-q, B-r, C-p
D. A-p, B-q, C-r

Answer 1

Hint:Calcium, strontium and barium are alkaline earth metals. They are highly reactive in nature. When the salts of these highly reactive metals are placed over Bunsen burner the salts decompose thermally and impart colours to the flame.

Complete answer:
The alkaline earth metals belong to the group 2 of the periodic table. The alkaline earth metals are beryllium $\left( {{\text{Be}}} \right)$, magnesium $\left( {{\text{Mg}}} \right)$, calcium $\left( {{\text{Ca}}} \right)$, strontium $\left( {{\text{Sr}}} \right)$, barium $\left( {{\text{Ba}}} \right)$ and radium $\left( {{\text{Ra}}} \right)$. All the alkaline earth metals are shiny, silvery-white, and reactive at standard temperature and pressure.
We are given three alkaline earth metals: salts calcium, strontium and barium. When the salts of these highly reactive metals are placed over Bunsen burner the salts decompose thermally and impart colours to the flame. The colours of the flame are produced because of the movement of the electrons in the metal ions present in their salts. When the salts of alkaline earth metals are exposed to the flame of Bunsen burner, colours are observed. Calcium exhibits brick red colour. Strontium exhibits crimson colour. And the barium exhibits apple green colour.
Thus, the correct match of the flame colours of the alkaline earth metal salts in the Bunsen burner is A-p, B-r, C-q.

Thus, the correct option is (A) A-p, B-r, C-q.

Note:
All the salts alkaline earth metals impart colours to the flame when exposed to Bunsen burner. Exceptions to this are beryllium and magnesium. Beryllium and magnesium do not impart colour to the flame because they are very small in size. Radium imparts a carmine red colour to the flame.