Three metal compounds, J, K and L, are warmed with a Bunsen burner. The observations are as follows. J: a colourless gas is given off, and it relights a glowing splint K: a colourless gas is given off, and it makes limewater turn milky L: no change Which row correctly identifies J, K and L?
- AJ: magnesium carbonate; K: potassium carbonate; L: potassium nitrate
- BJ: magnesium carbonate; K: potassium nitrate; L: potassium carbonate
- CJ: potassium nitrate; K: magnesium carbonate; L: potassium carbonate
- DJ: potassium nitrate; K: potassium carbonate; L: magnesium carbonate