Elements Q and R both burn when they are put in air. Both oxides that are produced dissolve in water. The solution made from the oxide of element Q changes Universal Indicator to red. The solution made from the oxide of element R changes Universal Indicator to blue. What are Q and R?
- AQ carbon, R sulfur
- BQ sodium, R magnesium
- CQ sodium, R sulfur
- DQ sulfur, R sodium