The metal that produces red violet colour in the non - luminous flame is

Options

A. Ba
B. Ag
C. Rb
D. Pb

Answer

C

Explanation

Alkali metals and their salts impart a characteristics colour to flame. The reason for flame colouration is that the energy of the flame causes an excitation of the outermost electrons which on return to their original position give out the ene3rgy so absorbed in the visible region. thus, Rb gives a red -violet colour to the flame.