Which of the following is not a weightless pollutant ?

Related Mcqs:

Noise level in a quiet private business office is about _____________ decibels?

A. 25 B. 50 C. 70 D. 85...

The pH value of potable water should be between____________________?

A. 1 to 1.5 B. 6.5 to 8 C. 13 to 14 D. 4 to 5...

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 density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

A. Ionosphere B. Troposphere C. Stratosphere D. None of these...

During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?

A. Idle running B. Acceleration C. Cruising D. Deceleration...