Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by________________?

Related Mcqs:

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

A. 105 B. 135 C. 160 D. 185...

Which of the following is a manmade source of air pollution ?

A. Automobile exhaust B. Forest fire C. Bacterial action in soil and swamp areas D. All A., B. and C....

The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

A. Mercury B. Brine C. Phosphate D. None of these...

Persons working in cement plants and limestone quarries are more prone to disease like__________________?

A. Cancer B. Asthma C. Silicosis D. Fluorosis (bone disease)...

H2S present in gaseous stream can be removed by adsorption on _____________________?

A. Silica gel B. Active carbon C. Bog iron D. Limestone powder...