Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?

The compound that will impart a brick-red color to a non-luminous Bunsen flame is CaCl2 (calcium chloride). When a salt is heated in a flame, the heat excites the electrons in the metal ion, causing them to emit light of a characteristic color. The color of the flame depends on the metal ion present in the salt. Calcium ions emit a brick-red color when they are heated in a flame. Therefore, when calcium chloride is heated in a non-luminous Bunsen flame, it imparts a brick-red color to the flame. Sodium ions, which are present in NaCl, impart a yellow color to a flame. Lithium ions, which are present in LiCl, impart a crimson color to a flame. Magnesium ions, which are present in MgCl2, impart a bright white color to a flame. In summary, only CaCl2 will impart a brick-red color to a non-luminous Bunsen flame, due to the characteristic color of the calcium ion when it is heated in a flame.