Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules.
1.) Air can be separated into its constituents such as oxygen, nitrogen etc.
2.) Air has a variable composition because at different places different amount of gases are present in air.
Answer:
B) Alcohol
Explanation:
It is methanol. Alcohol has group 'OH'
Answer: 280dm3
Explanation:Please see attachment for explanation