Growth of ______________ is promoted by the presence of manganese in water?

Related Mcqs:

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

A. < 1 B. 10-100 C. 100-200 D. 100-1000...

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...

TLV of mercury in potable (drinking) water is about ______________ ppm?

A. 0.001 B. 0.1 C. 1 D. 5...

Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?

A. Acts as a green house gas thereby raising earth’s temperature B. Causes asphyxia C. Causes increase in sea level D. Enhances the green house effect...

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?

A. Quenching of hot coke B. Discharging in the river stream C. Filtration and recycling for cooling coke oven gas D. None of these...