Class 8 Science Chapter 6 MCQ

Class 8 Science Chapter 6 MCQ (Multiple Choice Questions) of Combustion and Flame. After doing NCERT Books, these questions help in revising the chapter for tests and exams. There are more than 80 questions divided into sets of 10 questions each.

These questions cover all the important topic and intext questions from NCERT Books. Some exercises questions are also included in these practice tests.

Class 8 Science Chapter 6 MCQ Online Tests for 2020-2021

Class: 8Science
Chapter 6:Combustion and Flame
Contents:MCQ Online Tests with Explanation

Class 8 Science Chapter 6 MCQ with Answers and Explanation

MCQ Online tests for class 8 Science chapter 6 are given below with answer and explanation. All the questions are taken from Latest CBSE NCERT Books for 2020-2021 and are important for examination point of view. These MCQ Quiz questions takes hardly 30 minutes to complete and help to score better than ever.

Q1

In which of the following sentences are incorrect?

[A]. A chemical process in which a substance reacts with oxygen to give off heat, is called combustion.
[B]. When the clothes of a person catch fire, the person is covered with the blanket to extinguish fire.
[C]. The lowest temperature at which a substance catches fire is called, its ignition temperature.
[D]. The substances which give very high ignition, temperature and can easily catch fire with a flame, are called inflammable substances.
Q2

Boojho is writing some statements, choose the correct statement and help him:

[A]. Calorific value of wood is higher than that of coal.
[B]. Magnesium is a non-combustible metal.
[C]. Air is necessary for combustion.
[D]. All the above.




Q3

In villages, people use wood as fuel because:

[A]. It is considered to be an ideal fuel
[B]. Of its easily available and low cost
[C]. It is environment friendly
[D]. It catches fire easily
Q4

Which of the following statement is or are incorrect?

[A]. Compressed natural gas have higher calorific value than that of petrol.
[B]. Petroleum gas and natural gas are the example of gaseous fuel.
[C]. The calorific value of a fuel is expressed in kJ/kg.
[D]. Removal of oxygen is the only way of extinguish any fire.
Q5

Boojho is writing some sentences about condition for combustion. Choose the correct sentences and help him:

[A]. Heating the combustible substance to its ignition temperature.
[B]. Presence of a supporter of combustion like air or oxygen.
[C]. Presence of a combustible substance.
[D]. All the above.
Q6

If a person’s clothes catch fire the best way to extinguish the fire is to:

[A]. Throw water on the clothes
[B]. Use fire extinguisher
[C]. Cover the person with a woolen blanket
[D]. Cover the person with a polythene sheet



Q7

Boojho is writing some statements but he confused to know whether the statements are correct or not? Would you help him?

[A]. Rapid combustion is that type of combustion in which a large amount of heat and light are produced in a short time.
[B]. Spontaneous is that type of combustion in which reaction occurs on its own without helping of heat.
[C]. Explosive combustion is that type of combustion in which a large amount of heat, light and sound are produced in very fast way.
[D]. All the above.
Q8

Paheli is writing some statements but she confused to know whether the statements are incorrect or not? Would you help her?

[A]. Fuel is a material which is burnt to produce heat.
[B]. Different fuels produce different amount of heat on burning.
[C]. The amount of heat produced by the complete burning of 1 kg of a fuel is called its calorific value.
[D]. The calorific value of coal is much higher than the calorific value of LPG.




Q9

Which of the following is not a combustible substance?

[A]. Camphor
[B]. Glass
[C]. Straw
[D]. Alcohol
Q10

In which of the following sentences are incorrect?

[A]. A chemical process in which a substance reacts with oxygen to give off heat, is called combustion.
[B]. When the clothes of a person catch fire, the person is covered with the blanket to extinguish fire.
[C]. The lowest temperature at which a substance catches fire is called, its ignition temperature.
[D]. The substances which give very high ignition, temperature and can easily catch fire with a flame, are called inflammable substances.



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