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Chemistry in Everyday Life | Chapter 15 | 8th Science - Student Activities | 8th Science : Chapter 15 : Chemistry in Everyday Life

Chapter: 8th Science : Chapter 15 : Chemistry in Everyday Life

Student Activities

8th Science : Chapter 15 : Chemistry in Everyday Life : Student Activities with Questions Answers, Solution

Activity 1

Make a model using clay and match sticks for the following hydrocarbons.


Activity 2

Take a glass bottle and put some leaves, twigs, waste paper and saw-dust in it. Pour some water in it and keep it for 20 days. Open the bottle and bring a glowing splinter near the mouth. You can see a gas burning near the mouth showing its combustible nature. It is due to the evolution of natural gas.


Activity 3

Visit a bio-gas plant in your area with your teacher. Find out how it is prepared. Discuss about the uses and advantages of bio gas. In what way it will be helpful to the people in rural area?


Activity 4

In an outline map of India mark the places where coal mines are found. Also identify the type of coal found in those areas.


Activity 5

Find out where petroleum is extracted on a large scale in India. Also list out the petroleum refineries in India. 


Propane is used in LPG cylinders. Since it is an odouress gas, any leakage cannot be detected. Hence, a chemical byname Mercaptan is mixed with LPG to help in detection of any leakage of LPG.

Moderate temperature and humidity is needed to keep paintings and other ancient artifacts from being destroyed byenvironmental factors. Thus natural gas is used in museums to protect the monuments.

More to Know

The average composition of CNG.

Producer gas is known by different names in different countries. It is referred as Woodgas in USA and as Suction gas in UK.

It is also known as Black Diamond owing to its precious nature. On destructive distillation, 1000 kg of coal gives 700 kg of coke, 100 litres of ammonia, 50 litres of coaltar and 400 m3 of coal gas.

People in ancient cultures used crude oil for binding materials. It was also used as a sealant for water proofing various surfaces.

The first oil well in the world was drilled in Pennsylvania, USA in 1859. The second oil well was drilled in Makum, Assam, Indiain 1867.

Hydrogen - The future fuel Hydrogen could be the best alternative fuel in the future. It is a clean fuel as it gives out only water whileburning. Moreover, it has the highest energy content. It does not pollute air.

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