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Olympiad Test: Combustion And Flame - 2 - Class 8 MCQ


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15 Questions MCQ Test Science Olympiad Class 8 - Olympiad Test: Combustion And Flame - 2

Olympiad Test: Combustion And Flame - 2 for Class 8 2024 is part of Science Olympiad Class 8 preparation. The Olympiad Test: Combustion And Flame - 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Olympiad Test: Combustion And Flame - 2 MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Combustion And Flame - 2 below.
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Olympiad Test: Combustion And Flame - 2 - Question 1

The resulting products in the case of incomplete combustion of methane due to insufficient supply of oxygen are

Olympiad Test: Combustion And Flame - 2 - Question 2

For combustion to take place, we need

Detailed Solution for Olympiad Test: Combustion And Flame - 2 - Question 2

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.

  • There must be Fuel to burn.
  • There must be Air to supply oxygen.
  • There must be Heat (ignition temperature) to start and continue the combustion process.
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Olympiad Test: Combustion And Flame - 2 - Question 3

To extinguish a flame, which of these methods is used?

Olympiad Test: Combustion And Flame - 2 - Question 4

The combustion in which a material bursts into flames without the application of heat is called

Olympiad Test: Combustion And Flame - 2 - Question 5

Which of these material represents spontaneous combustion?

Olympiad Test: Combustion And Flame - 2 - Question 6

Which of these is a solid pollutant?

Olympiad Test: Combustion And Flame - 2 - Question 7

SPM, also called dangerous pollutants, means

Olympiad Test: Combustion And Flame - 2 - Question 8

The coldest zone of flame is –––– zone.

Olympiad Test: Combustion And Flame - 2 - Question 9

In which zone is carbon monoxide burns with a blue colour at the base of the wick?

Detailed Solution for Olympiad Test: Combustion And Flame - 2 - Question 9

Blue zone: This is due to the combustion of incompletely combusted carbon-monoxide.

Olympiad Test: Combustion And Flame - 2 - Question 10

The SI unit of calorific value is

Olympiad Test: Combustion And Flame - 2 - Question 11

The calorific value of petrol is

Detailed Solution for Olympiad Test: Combustion And Flame - 2 - Question 11

The calorific value of diesel fuel is roughly 45.5 MJ/kg (megajoules per kilogram), slightly lower than petrol which is 45.8 MJ/kg.

Olympiad Test: Combustion And Flame - 2 - Question 12

A fuel is considered good if it

Olympiad Test: Combustion And Flame - 2 - Question 13

Burning of magnesium is an example of which combustion?

Olympiad Test: Combustion And Flame - 2 - Question 14

The most commonly used fire extinguisher is soda-acid fire extinguisher. Cylinder is filled with a solution of

Olympiad Test: Combustion And Flame - 2 - Question 15

Which of these is gaseous fuel?

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