CHEMISTRY [2 Mark Question Answer]

(a) Use flame test to identify them zinc burns with blue-green to pale green color so zinc chloride burns with blue-green color
(b) Potassium carbonate gives lilac colour while Sodium chloride obtained yellow flame,

The precipitate turns white on cooling. Carbon dioxide can be detected by formation of white precipitate in lime water. Copper carbonate on dry heating yields two products namely, copper oxide and carbon dioxide. Copper nitrate is blue in color, which turns into black color of copper oxide