Q. What happens when (Also give chemical equations) : 1. Magnesium alkali reacts with sulphuric acid?
2. A mixture of carbon dioxide and ammonia is heated strongly?
3. Aluminium chloride reacts with sodium hydroxide solution?
4. An acid reacts with metallic carbononate?​

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.

Ibelieve your answer is true 

The answer is probably c. xylem