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Olympiad Test: Combustion And Flame - 1 - Class 8 MCQ


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10 Questions MCQ Test Science Olympiad Class 8 - Olympiad Test: Combustion And Flame - 1

Olympiad Test: Combustion And Flame - 1 for Class 8 2025 is part of Science Olympiad Class 8 preparation. The Olympiad Test: Combustion And Flame - 1 questions and answers have been prepared according to the Class 8 exam syllabus.The Olympiad Test: Combustion And Flame - 1 MCQs are made for Class 8 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Combustion And Flame - 1 below.
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Olympiad Test: Combustion And Flame - 1 - Question 1

Calorific value of a fuel is the heat energy produced when

Olympiad Test: Combustion And Flame - 1 - Question 2

Which of the following pairs correctly represents the main acids present in acid rain?

Detailed Solution for Olympiad Test: Combustion And Flame - 1 - Question 2

The main acids found in acid rain are:

  • Sulphuric acid (H2SO4)
  • Nitric acid (HNO3)

These acids form when pollutants like sulphur dioxide (SO2) and nitrogen oxides (NOx) mix with moisture in the atmosphere.

Therefore, the correct pair representing the main acids in acid rain is:

  • H2SO4 and HNO3

 

Olympiad Test: Combustion And Flame - 1 - Question 3

Good fuels have

Olympiad Test: Combustion And Flame - 1 - Question 4

Log of wood does not burn very easily but it is easy to burn small pieces of wood dipped in kerosene oil. This is because kerosene oil provides proper

Olympiad Test: Combustion And Flame - 1 - Question 5

The chemicals present in fire extinguisher are

Olympiad Test: Combustion And Flame - 1 - Question 6

Which of these is(are) liquid fuel(s) ?

Olympiad Test: Combustion And Flame - 1 - Question 7

Which poisonous gas is formed as a result of incomplete combustion?

Olympiad Test: Combustion And Flame - 1 - Question 8

The hottest zone of a candle flame is

Olympiad Test: Combustion And Flame - 1 - Question 9

Which of these fuels has the highest calorific value?

Olympiad Test: Combustion And Flame - 1 - Question 10

When a hydrocarbon (present in fuels) burns completely, the products formed are

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