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Combustion

The ignition ...

Question

The ignition temperature of wood increases in the presence of water.

A

True

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B

False

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Solution

The correct option is A True
$∙$ Ignition temperature of wood in presence of water increases. Now in presence of water it will ignite at higher temperature, because some amount of heat will be utilised in vaporization of water.

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Similar questions

Q. The ignition temperature of wood _________ in the presence of water.

Q. Assertion :Saltwater boils at a higher temperature than pure water. Reason: The presence of salt increases the vapor pressure of water.

Q. Assertion : We can boil water in a paper cup.
Reason : Ignition temperature of paper lowers due to water.

Q. Statement 1: Saltwater boils at a higher temperature than pure water.
Statement 2: The presence of salt increases the vapor pressure of water.

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 ______.

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