A sample of anhydrous calcium nitrate is put into a test-tube and heated strongly in a roaring Bunsen flame until decomposition occurs. The gas present in the test-tube is then described. After that, a glowing splint is introduced into the test-tube and any resulting changes are recorded. Which observations are correct?
- Abrown gas; the splint goes out
- Bbrown gas; the splint relights
- Ccolourless gas; the splint goes out
- Dcolourless gas; the splint relights