Question 2 (a)
Fill in the blank:
Burning of wood and coal causes ___of air.

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Solution

Burning of wood and coal causes pollution of air.

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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 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___

(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.

Fill in the blanks.

(a) The slow process of conversion of dead vegetation into coal is called__________.

(b) Coal and petroleum are formed from the dead remains of organisms and are known as __________.

(d) During the processing of coal to get coke, coal tar and __________ are also obtained.

(e) The process of separating the various constituents of petroleum is known as __________.

(f) Excessive burning of fossil fuels is a major cause of __________.

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