Chemistry of our environmnet-17(10) Flashcards
Which gas is greatest in clean, dry air?
Nitrogen (N2)
Why do scientists not calculate the amount of water vapour in the air?
The amount of water vapour in the air is extremely variable; for example, in the mountains, it can be 0.2% to 4% in tropical regions.
What makes up 21% of the clean, dry air around us?
Oxygen(O2)
What makes up 0.90% of the clean, dry air around us?
Argon(Ar)
What makes up 0.04% of the clean, dry air around us?
Carbondioxide(Co2)
Why do people extract oxygen from the air?
People extract oxygen from the air to treat hospital patients and for industrial welding.
What can some species do with inert nitrogen?
Some animals can take the inert nitrogen from the air and use it to make themselves amino acids.
How can humans use inert nitrogen?
Humans combine the nitrogen with hydrogen to make ammonia. They make processed foods with ammonia, such as chips (the ammonia acts as a preservative and is the air in the bag)
What oxides have we increased?
- Nitrogen oxides
- Sulfur dioxide
- Methane
- Carbon monoxide
- Carbon dioxide.
How is sulfur dioxide (SO2) formed?
Sulfur dioxide is formed when fossil fuels are burned, as it is an impurity in them. After the fossil fuel is done burning, sulfur dioxide gets added to oxygen to make sulfur dioxide.
What does sulfur dioxide do to the respiratory tract?
Sulfur dioxide irritates the inner lining of your respiratory tract and causes breathing issues.
Why is acid rain harmful to aquatic life?
The acidity levels in water will increase, and due to this, fish and other aquatic life will die or fall sick.
Why is acid rain harmful to the land?
The acid rain will corrode and damage the materials that the building is made of.
What are the main causes of sulfur dioxide?
The main causes of sulfur dioxide are:
1. Making electricity by burning coal and oil.
2. burning petrol or diesel in an engine.
How is desulfurization done?
First, sulfur dioxide is reacted with water to form acidic water; this acidic water is later neutralized with a reaction between the acid water and calcium oxide.This is a acid-base reaction.
