COAL AND PETROLEUM
TEST
MAXIMUM TIME: 45 MINUTES
MAXIMUM MARKS: 30 MARKS
1. Expand CNG and write its uses. (3)
2. What is the main component of CNG and LPG. (2)
3. Write two uses of coke. (2)
4. What happens when wood is heated in absence of air? (2)
5. Why coal and petroleum are called fossil fuels? (3)
6. How does coal formation takes place in nature? (4)
7. What are the components of petroleum? Write its uses. (4)
8. Explain advises given by PCRA for saving petrol and diesel. (4)
9. What are natural resources? Classify them. Write examples. (5)
10. What are petrochemicals? (1)
Answers
Answer:
full form of CNG is compressed natural gas
main component of cng is methane(75%)
heating wood in abscence of o2 is called destructive distillation
because they are fossils
coal becomes under appropriate heat is given
Answer:
Explanation:
1.compressed natural gas,its uses are :Compressed natural gas (CNG) is a fuel that can be used in place of gasoline, diesel fuel and liquefied petroleum gas (LPG). Its use is also increasing in South America, Europe and North America because of rising gasoline prices.
2.CNG which stands for compressed natural gas is mainly composed of Methane, while LPG which stands for Liquified petroleum gas consists of Propane, Butane and other gases as well.
3..Coke is used as a domestic fuel.
.Coke is used as a reducing agent in metallurgical processes.
.Coke is used for producing fuel gases such as water gas(CO+ H2) , and producer gas
4.wht happens when wood is heated in the absence of air. Charcoal will be the product when wood is heated in absence of air. when wood is heated in the absence of air ,it will not burn.
5.Coal, Oil and Gas are called "fossil fuels" because they have been formed from the fossilized remains of prehistoric plants and animals. Fossil fuels are a nonrenewable energy source since they take millions of years to form. The plants that turned into fossils stored energy from the sun by photosynthesis.