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Coal and Its Fomation

A substance t...

Question

A substance that reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?

A

iron nail

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B

glass

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C

Stone piece

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D

wood

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Solution

The correct option is D wood
The substances that burn in presence of air to produce heat and light are called combustible substances.

Eg:- Wood, coal, charcoal, kerosene, petrol, diesel, liquified petroleum gas (LPG), compressed natural gas (CNG), etc.

Substances like stone, glass, iron nails, etc. do not burn on being exposed to flame as they have high Ignition temperature. Such substances are called non-combustible substances.

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Similar questions

Q. 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

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. A substance that can undergo combustion is called a combustible substance.

Q. Which of the following is a combustible substance?

Q. A substance that can not undergo combustion is called a non-combustible substance.

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Coal and Its Fomation

Standard VIII Chemistry

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