Class 8 Science Chapter 5 MCQ Online Test for 2020-2021
Class: 8 | Science |
Chapter: 5 | Coal and Petroleum |
Contents: | MCQ Online Tests with Answers |
Class 8 Science Chapter 5 MCQ Test with Explanation
Class 8 Science Chapter 5 MCQ with suitable answers and explanation are given below. All the questions are verified by the subject experts. If still there is any error, please inform us for modification. There are more than 75 questions in the sets of 10 questions. All the questions are confined to NCERT Textbooks for Class 8 Science only. Click on Start a New Test and get a set of 10 questions as a new test.
Q1
Read the following statements and choose the correct one(s):
[A]. Coal is one of the fuels used to cook food.
[B]. When heated in air coal burns and produces mainly carbon dioxide gas.
[C]. Coal tar is black, thick liquid with an unpleasant smell.
[D]. All the above
Answer: Option D
Explanation:Here, all these statements are correct. Hence, your answer will be option [D].
Q2
Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?
[A]. Compressed natural gas is less polluting fuel than petrol and diesel.
[B]. Under high temperature and pressure did plants get slowly convert to coal.
[C]. Wildlife is an exhaustible natural resource.
[D]. Resources which are present in unlimited quantity in nature are called exhaustible natural resources.
Answer: Option D
Explanation:Resources which are present in unlimited quantity in nature are called in-exhaustible natural resources.
Q3
Naphthalene balls are obtained from coal tar and are used as:
[A]. Mosquito repellent
[B]. Honeybee repellent
[C]. Moth repellent
[D]. Snake repellent
Answer: Option C
Explanation:Naphthalene balls are used to repel moths and other insects (in stored clothes, etc.)
Q4
Paheli is writing some statements. She wants to know in which of the following statements is or are correct?
[A]. Coal is hard, black, combustible mineral that consists mainly of carbon.
[B]. The slow process by which the dead plants buried deep under the earth have coal is called carbonization.
[C]. Coal is important because it can be used as a source of heat energy.
[D]. All the above.
Answer: Option D
Explanation:Here, all these statements are correct. Hence, your answer will be option [D].
Q5
Fossil fuels are obtained from:
[A]. Remains of non-living materials
[B]. Dead remains of birds only
[C]. Dead remains of insects only
[D]. Dead remains of living organisms
Answer: Option D
Explanation:Fossil fuels are obtained from the remains of living organisms (plants and animals) buried under the earth millions of years ago.
Note: Coal, Petroleum and Natural gas are fossil fuels.
Q6
Consider the following statements and choose the incorrect one:
[A]. he petroleum gas which has been liquefied under pressure is called liquefied petroleum gas.
[B]. Natural gas consists mainly of methane with small quantities of ethane and propane.
[C]. When natural gas is compressed by applying pressure, it is called compressed natural gas.
[D]. Natural gas is called an uncleaned fuel because it burns with producing smoke.
Answer: Option D
Explanation:Natural gas is called a clean fuel because it burns without producing any smoke and does not cause air pollution. In fact, natural gas is stored under high pressure as compressed natural gas. It becomes easier to store, transport and use natural gas in the form of CNG.
Q7
Which is the major component of LPG and CNG?
[A]. Hydrogen, Ethane
[B]. Carbon dioxide, Propane
[C]. Butane, Methane
[D]. Propane, Butane
Answer: Option C
Explanation:The major component of LPG and CNG are butane and methane respectively.
Q8
Air is a natural resource and cannot be exhausted by human activities. It is known as in exhaustible natural resources. Which of the following is another inexhaustible natural resource?
[A]. Coal
[B]. Petroleum
[C]. Sunlight
[D]. Minerals
Answer: Option C
Explanation:Sunlight, air and water are inexhaustible natural resources that means which cannot be exhausted by human activities.
Q9
Paheli is writing some statement which is given by her teacher. Would you help him to choose the incorrect statements?
[A]. Fossils are the remains of the pre-historic plants or animals, buried under the earth millions of years ago.
[B]. Fossil fuels are exhaustible natural resources.
[C]. The slow process by which the dead plants breathe deep under the earth have become coal is called carbonization.
[D]. Coal is used to make Coca-Cola.
Answer: Option D
Explanation:Coal is used to make coke, not Coca-Cola. Coke is an almost pure form of carbon.
Coal is important because it can be used as a source of heat energy. Coke is a porous and tough, black solid substance. Coke is prepared by heating coal in the absence of air. Coke is used in the manufacturing of “steel”. Although, coke burns without producing any smoke whereas coal produces a lot of smoke on burning.
Q10
Consider the following statement and choose the incorrect one:
[A]. Coal gas, coal tar and coke are called products of coal.
[B]. The strong heating of coal is the absence of air is called “destructive distillation” of coal.
[C]. Coal tar is a thick, black liquid having an unpleasant smell which is obtained by heating coal in the absence of air.
[D]. Coal is used in the manufacturing of copper and aluminum.
Answer: Option D
Explanation:Coke is prepared by heating coal in the absence of air. Coke is mainly used as a reducing agent in the extraction of metals. Such as iron, zinc etc. Coke is used in the manufacturing of Steel.
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