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Byju's Answer
Standard VIII
Chemistry
Combustible and Non-Combustible Substances
Question 1A s...
Question
Question 1
A substance which reacts with oxygen giving heat is called a combustible substance. Which, one of the following is a combustible substance?
(a) Iron nail
(b) Glass
(c) Stone piece
(d) Wood
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Solution
The answer is (d).
Wood is a combustible substance. It is a solid fuel and produces smoke during combustion.
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6
Similar questions
Q.
A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?
Q.
Fill in the blanks using the words given in the box.
ignition, petrol, combustion, calorific value, combustible, inflammable
(a) A chemical process in which a substance reacts with oxygen to give off heat is called ______.
(b) Wood, paper, CNG are __________ substances.
(c) The lowest temperature at which a substance catches fire is called its ______ temperature.
(d) Ignition temperature of _______ is lower than that of wood.
(e) The substances which have very low _______ temperature and can easily catch fire with a flame are called _______ substances.
(f) The amount of heat energy produced on complete combustion of 1kg of a fuel is called its ______.
Q.
Question 4
Which of the following is not a combustible substance?
(a) Camphor
(b) Glass
(c) Straw
(d) Alcohol
Q.
Question 26
Fill in the blanks using the words given in the box.
(a) A chemical process in which a substance reacts with oxygen to give off heat is called
___
(b) Wood, paper, CNG are
___
substances.
(c) The lowest temperature at which a substance catches fire is called its
___
temperature.
(d) Ignition temperature of
___
is lower than that of wood.
(e) The substances which have very low
___
temperature and can easily catch fire with a flame are called
___
substances.
(f)
The amount of heat energy produced on complete combustion of 1kg of a fuel is called its
___
.
Q.
Question 26
Fill in the blanks using the words given in the box.
(a) A chemical process in which a substance reacts with oxygen to give off heat is called
___
(b) Wood, paper, CNG are
___
substances.
(c) The lowest temperature at which a substance catches fire is called its
___
temperature.
(d) Ignition temperature of
___
is lower than that of wood.
(e) The substances which have very low
___
temperature and can easily catch fire with a flame are called
___
substances.
(f)
The amount of heat energy produced on complete combustion of 1kg of a fuel is called its
___
.
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Standard VIII Chemistry
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