Fill in the following blanks with suitable words :

(a) A fuel must be heated to its_ before it starts burning.

(b) The most common supporter of combustion around us is_

(c) Fire produced by burning oil cannot be controlled by_

(d) A liquid fuel used in homes is_

(e) The amount of heat evolved when 1 kg of a fuel is burnt completely is called its_

(f) The substances which vaporise during burning, give_

(g) Burning of wood and coal causes___ of air.

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Solution

a) ignition temperature

b) Air (oxygen)

c) Water

d) LPG

e) calorific value

f) flame

g) pollution

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Similar questions

Fill in the blanks:

(a) Burning of wood and coal causes _______ __ of air.

(b) A liquid fuel used in homes is ___________.

(d) Fire produced by oil cannot be controlled by ________ _.

Fill in the following blank with a suitable word:
The amount of heat produced by burning a unit mass of a fuel completely is known as its ................ value.

Fuel must be heated to its before it starts burning.

Fill in the following blanks with suitable words :

(a) Fossil fuels are ___ , ___ and ___ .

(b) Coal contains mainly ___ .

(d) The process of separation of different constituents from petroleum is called ___ .

(e) The least polluting fuel for vehicles is ___ .

(f) The burning of fossil fuels causes air ___ and also leads to global ___ .

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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a) ignition temperature b) Air (oxygen) c) Water d) LPG e) calorific value f) flame g) pollution

a) ignition temperature

b) Air (oxygen)

c) Water

d) LPG

e) calorific value

f) flame

g) pollution