Chapter U1.2, Problem 5E

Interpretation Introduction

Interpretation:

Ten changes observed in the world needs to be describes. The changes which involve chemistry needs to be identified and explained.

Concept introduction:

Our body mainly contains carbohydrates, proteins, fat etc. all are carbon compounds so one can say our whole life is based on chemicals and different chemicals are used to complete our daily life activities.

Explanation of Solution

Daily life activities basically related with chemicals directly or indirectly are as follows:

1. First of all, discuss the air which human beings inhale. Due to our day by day activities air becomes polluted.

2. There are different chemical changes that take place like global warming. Due to global warming, the environment temperature rises day by day.

3. Generally, iron material is used to increase the strength of any material but it can get damaged due to rusting or corrosion.

4. If any food material is exposed for some time in open space then after a few hours you will notice a foul smell, it is because of the decomposition of food material, i.e., rancidity of food.

5. The cutting of trees and burning of wood is also a change which is related to chemistry. This is because combustion of wood results in the formation of carbon dioxide.

6. The main cause of noise pollution is a sound produced by industrial machines.

7. Few industries that are using highly toxic explosive chemicals mainly cause radioactive pollution.

8. Use of plastic-based materials that are non-biodegradable makes the environment polluted.

9. Excessive use of petroleum products increases the amount of CO_2, NO_2, etc. gases in the environment. These gases are the main cause of global warming.

10. Use of non-biodegradable cleaning solutions that increase water pollution.

For cleansing purpose use bio-degradable eco-friendly solutions to avoid the addition of non-biodegradable substances in water. The use of vehicles should be minimized to control the excessive use of fuels. All the plastic-based materials should be replaced with bio-degradable materials.