Which pair of the following chlorides does not impart color to the flame ?

Options

A. `BeCI_(2) and SrCI_(2)`
B. `MgCI_(2) and CaCI_(2)`
C. `BeCI_(2) and MgCI_(2)`
D. `CaCI_(2) and BaCI_(2)`

Answer

C

Explanation

On account of relatively high ionization enthalpies, Be and Mg are not able to excite their `e^(-)` s in the visible range. Hence, their salts do not impart characteristic color to the flame.