EASY
8th CBSE
IMPORTANT
Earn 100

Why combustion considered as a chemical change?

Important Questions on Combustion and Flame

EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 1
Material which burn easily are called _____ materials.
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 2
Fuel substances that are made of only hydrogen and carbon are called _____.
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 4
_____ substances have ignition temperatures lower than 100 C∘.
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 6
_____ combustion takes place when a mixture of combustible material and air burn completely in a very short period of time.
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>Think and Discuss
Name the type of fire extinguisher that is used to combating fire caused by solid materials only. It cannot be used to douse fire caused by petrol or any other liquid. Why?
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>Find Out
What is the most ideal fuel?
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 1
What conditions are required for fire?
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>PRACTICE TIME>Q 2
By taking what precautions can we ensure the safety of stored materials from fire?