EASY
8th CBSE
IMPORTANT
Earn 100

Which of the following substances has the lowest ignition temperature?

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Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 57
One of the following is not a combustible substance. This one is:
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 58
Which of the following is not used in making matchsticks these days?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 59
Which of the following undergoes spontaneous combustion?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 60
Which of the following statement is not correct about carbon dioxide acting as a fire extinguisher for electrical fires?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 61
Fires in underground coal mines usually occur due to the:
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 62
The calorific value of a fuel is 40000 kJ/kg. This fuel is most likely to be:
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 63
Which of the following fuels has the highest calorific value?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Multiple Choice Questions (MCQs)>Q 64
On a cold winter night, the persons sleeping in a room with closed door and windows with a coal fire burning inside may die due to the excessive accumulation of: