Basic Concepts of Chemistry Questions and Answers - 1

Question: 1

Write about the combustible property of oxygen?

Answer:

Oxygen is a non –combustible gas as it does not bum on its own. It supports the combustion of other substances.

Question: 2

What do you mean by aerated water?

Answer:

Aerated water is nothing but carbon dioxide dissolved in water under pressure. This is also called soda water.

Question: 3

What is green house effect?

Answer:

Certain gaseous molecules present in the atmosphere absorb the infra red rays and reradiate the heat in all directions.

2. Hence, these gases maintain the temperature of earth’s surface.

3. The gases which absorb these radiations are called green house gases and this effect is called green house effect.

Question: 4

Name the microbe which converts atmospheric nitrogen directly into soluble nitrogen compounds?

Answer:

Bacteria

Question: 5

What is dry ice?

Answer:

1. Solid carbon dioxide, called as dry ice is used as a refrigerant.

2. The gas is so cold that moisture in the air condenses on it, creating a dense fog which is used in stage shows and movie effects.