Questions

Write any two chemical properties of carbon dioxide gas.

Write any two physical properties of carbon dioxide gas.

What happens when carbon dioxide gas is cooled at -78$^o$C?

Where is carbon dioxide found in nature?

Write down the molecular formula and molecular weight of carbon dioxide.

What is downward displacement of air?

What is upward displacement of air?

What happens in the following processes? Write with a balanced chemical reaction.

1. The mixture of ammonium chloride and calcium hydroxide is heated.
2. Ammonia is mixed with water.
3. Ammonia reacts with hydrochloric acid.

What happens in the following processes? Write with a balanced chemical reaction.

1. Carbon dioxide is passed through lime water for some time.
2. Carbon dioxide is passed through lime water for a long time.
3. A burning magnesium is inserted into the jar full of carbon dioxide gas.

Write any four uses of ammonia gas.