‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?

Related Mcqs:

Which of the following is not a weightless pollutant ?

A. SPM B. Thermal pollution C. Radioactive rays D. Noise pollution...

Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?

A. Thermal power plant B. Petroleum refinery C. Nitric acid plant D. Sulphuric acid plant...

Lagooning process is mainly a means of the__________________?

A. Sludge disposal B. Reduction of excessive flow in sewers C. Biological treatment of wastes D. None of these...

The progressive warming up of the earth’s surface is mainly due to the___________________?

A. Automobile exhaust B. Blanketing effect of CO2 in the atmosphere C. De-forestation D. Thickening of ozone layer...

Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?

A. Carbonates B. Bi-carbonates C. Iron & manganese D. Arsenic...