To a test solution, add barium chloride solution and then add excess dilute hydrochloric acid or nitric acid.
If a white precipitate is formed which is soluble in excess acid liberating sulphur dioxide gas, then the substance contains a:
NO3⁻.
CO3²⁻ or HCO3⁻.
SO3²⁻.
SO4²⁻.
The flame coulour of Ca²⁺ is?
Apple-green.
Golden yellow.
Bluish-green.
Brick-red.